Why Won’t My Cat Eat After Vaccination? Understanding Cat Behavior After Vaccines

If you’re a cat owner, you’ve probably experienced the anxiety of finding your feline friend uninterested in their mealtime. The situation becomes even more challenging when the lack of appetite follows a visit to the veterinarian’s office, specifically after a vaccination. As a pet owner, understanding cat behavior after vaccination is essential. In this blog post, we’ll explore why your cat may not want to eat after a vet visit, discuss the symptoms of vaccine reactions in cats, and provide tips on how to make your cat feel better after vaccines.

The Dreaded After-Vaccine Phase

Cats are adorable creatures, but boy can they be finicky. They’ll turn their nose up at the most gourmet of meals, giving you a look that says, “What is this peasant food?” That’s why it can be especially concerning when your kitty refuses to eat after a vaccine. Here are some insights into why this happens.

Why Won’t Your Cat Eat After a Vaccine?

While the specifics around why some cats lose their appetite after a vaccine seem to be a mystery, there are some things that could be at play. A post-vaccine cat might be running a low-grade fever, making them feel achy and less inclined to eat. Additionally, vaccines can sometimes cause gastric upset or soreness, which can further dissuade your cat from chowing down.

When Should You Worry About Your Cat’s Lack of Appetite?

It’s important to note that a lack of appetite after a vaccine could be perfectly normal, and your feline friend might soon be back to their normal eating habits without intervention. However, if your cat goes more than 36 hours without eating or drinking anything, it’s best to give them a visit to the vet. They could be experiencing an adverse reaction to the vaccine.

cat won't eat after vaccine

How to Encourage Your Cat to Eat

If you’re worried about your furball’s lack of enthusiasm around mealtime, a few tricks can help coax them back to eating. Try offering your cat wet food, which tends to be more tasty and enticing than their usual kibble. Additionally, warming up their food to room temperature can help make it more aromatic and attractive to them. Finally, keeping their food and water bowl within easy reach, in a quiet and comfortable spot, can further encourage them to eat.

It’s normal to worry when your cat shows a sudden lack of interest in their meals, especially after a vaccine. However, in most cases, your cat will be back to their normal healthy state soon enough, with a little bit of gentle nudging from you. Keep an eye on their behavior, and if they don’t eat anything for more than 36 hours, don’t hesitate to visit a vet. Stay calm and keep tempting them with treats, and soon enough, your kitty will be back to their old, feisty self!

Cat Behavior After Vaccination

After getting a vaccine, your feline friend may experience some behavioral changes that are worth noting. These changes can be temporary and may vary depending on the individual cat. Here are some notable behaviors you may observe after vaccinating your cat:

Increased Sleep

It’s not uncommon for cats to sleep a lot, but after receiving a vaccine, they may sleep even more than usual. It’s like they want to hold onto that comfortable feeling of being cuddled up in their bed all day long. However, don’t worry about excessive sleep. If they’re eating and drinking normally, it’s just their body’s way of powering up their immune system.


After vaccination, some cats may become more lethargic or sluggish than usual. It’s normal for cats to be less active after vaccination as their body works to produce antibodies to fight off the pathogens in the vaccine. However, if your cat seems especially listless, it never hurts to check with your vet to make sure everything is all right.

Avoiding Food and Water

It isn’t unusual for cats to have a decreased appetite after vaccination. They may refuse to eat and drink for a few hours or days following vaccination. This is only temporary, and they will eventually return to their usual eating habits.


Some cats may become restless after vaccination, exhibiting more activity than they usually do. They may also display signs of hyperactivity or anxiety. Give them some extra attention, snuggle up with them, and reassure them they are OK. They may just need some extra TLC from their favorite human.

Hiding or Seeking Hiding Spots

Cats may choose to hide after being vaccinated, seeking out secret hiding spots in your home. This behavior can be a result of the stress and discomfort they are feeling after getting a vaccine. It will usually pass with time.

In conclusion, it’s essential to keep a close eye on your cat’s behavior after they’ve received a vaccine. Keep in mind that behavior changes are normal and temporary, and with a little extra care and attention, they’ll be back to their usual selves in no time. If you have any concerns, don’t hesitate to call your vet.

Dog Not Eating After Vaccinations

If you think only cats are difficult to deal with after vaccinations, think again! Dogs can be just as much of a pain when it comes to eating. Here are some things to keep in mind if your furry friend refuses to eat after getting vaccinated.

It’s Not Uncommon for Dogs to Lose Their Appetite

Just like cats, dogs can experience a loss of appetite after getting vaccinated. In most cases, this behavior is temporary and won’t last long. However, if it persists for more than a day or two, you may want to consult a veterinarian.

Give Your Dog Some Space

It’s essential to give your dog some space and time to recover after vaccinations. Dogs don’t feel like being cuddled or petted when they’re feeling uncomfortable. So, refrain from unnecessary touching and let your pup relax during the recovery period.

Offer Your Dog Nutritious Food

While your pup has no appetite, make sure the food you offer is nutritious and easy to digest if they eat anything at all. Try boiled chicken breast or rice, which not only provide vital nutrients but are easy on the stomach.

Don’t Force Your Dog to Eat

Lastly, it’s crucial not to force your dog to eat during the recovery period. A lack of appetite is a natural response to vaccinations and forcing food can make the situation worse. Instead, wait a little longer and see if your pet’s appetite returns on its own.

Final Thoughts

While it can be challenging to see your pet’s appetite decline, rest assured that it’s a temporary condition, and your furry friend will be back to its usual self in no time. In the meantime, pay attention to your dog’s symptoms and consult a veterinarian if the situation persists for more than a few days.

Cat Lethargic 3 Days After Vaccine

So, your fluffy feline got their vaccine, and now they’re feeling a bit, well, off. Maybe they’re doing that thing where they’re refusing to eat, or perhaps they’re just flat-out exhausted. Whatever the case may be, it’s natural to worry about your fur baby. After all, they can’t tell you exactly what’s going on with them.

Don’t fret, my feline-obsessed friend. Here’s what you need to know if your cat is acting lethargic three days after receiving their vaccine.

It’s Completely Normal

First off, know that it’s entirely normal for your cat to feel a bit “off” for a few days after getting vaccinated. It’s similar to how humans can sometimes feel run down or even a little sick post-vaccine. It doesn’t necessarily mean that something is wrong.

Give Your Cat Time

At the risk of sounding cliché, time truly can heal all wounds. Or in this case, time can help your cat feel like their old self again. As long as your cat is still drinking water, you probably don’t need to worry too much. Just give them some time to rest and recover.

Keep an Eye Out for Signs of Trouble

Of course, it’s still necessary to keep an eye out for any potential red flags. If your cat’s lethargy is accompanied by other symptoms, like vomiting or diarrhea, or if they’re completely refusing to eat or drink, it’s time to call the vet. They can help you figure out what’s going on and provide a game plan for getting your kitty back on the road to recovery.

Try Some Home Remedies

If your cat is only a little bit lethargic, you might be able to help ease their symptoms with some simple home remedies. Try offering them some tuna (in water, not oil) to see if that piques their interest. You could also offer them some chicken baby food – many cats absolutely love the stuff. And, of course, plenty of snuggles and love can help boost your cat’s spirits too.

Remember, You Know Your Cat Best

At the end of the day, you know your cat better than anyone. If you sense that something just isn’t right with them, don’t hesitate to call the vet. It’s always better to err on the side of caution when it comes to our furry friends.

So go ahead, take a deep breath, and snuggle up with your fur baby. They’ll be back to their old antics in no time.

Why Won’t My Cat Eat After Vet Visit?

As a cat parent, going to the vet can be a stressful experience for both you and your feline friend. After all the poking and prodding, the last thing you want to deal with is a cat that refuses to eat. So, why won’t your cat eat after a vet visit? Let’s dig in:


cat won't eat after vaccine

Going to the vet can be a stress-inducing experience for cats. They’re in an unfamiliar environment, surrounded by strange people and animals, and often subjected to uncomfortable procedures. The stress can cause a decrease in appetite, leading to a lack of interest in food.

Side Effects of Medication

If your cat received medication during their vet visit, it could be causing a loss of appetite. Certain medications can cause nausea, gastrointestinal upset, and a metallic taste in the mouth, making food less appealing.

Pain and Discomfort

Depending on the reason for the vet visit, your cat may be experiencing pain or discomfort. If they had an injection or surgical procedure, it’s normal for them to feel a bit sore afterward. Pain or discomfort can cause cats to lose their appetite, and they may not feel like eating until they start to feel better.

Fear of Reinjury

If your cat underwent a procedure that required them to fast beforehand, they may associate that hunger with the vet visit. This fear of reinjury can cause cats to avoid eating after a vet visit, even though there’s no threat of further procedures.

How to Encourage Your Cat to Eat

If your cat is refusing to eat after their vet visit, there are a few things you can try to encourage them:

  • Offer their favorite food or treats
  • Warm up their food to make it more appealing
  • Use a different type of food, such as wet food instead of dry
  • Encourage them to eat in a calm, quiet environment
  • Give them time to recover and adjust to being home before expecting them to eat

When to Call the Vet

If your cat still isn’t eating after a vet visit, it’s important to consult with your vet. They may want to do further tests or prescribe medication to encourage eating. It’s always better to be safe than sorry when it comes to your cat’s health.

In conclusion, there are many reasons why your cat may not be eating after a vet visit. Whether it’s stress, medication side effects, pain, fear of reinjury, or something else entirely, it’s essential to be patient and provide them with the support they need to feel comfortable and safe. If you’re concerned about your cat’s health, don’t hesitate to contact your vet.

What to feed a sick cat that won’t eat

Introducing food to a sick cat is not an easy task, especially when they won’t eat after a vaccine. However, finding the right food to feed to them can make all the difference. Here are a few suggestions on what you can feed a sick cat that won’t eat.

Wet food

Canned or wet food is an excellent option for your sick cat. The smell of the food can attract their attention, and the wet texture can be easier for them to swallow.

Chicken broth

When your cat is sick, the last thing you want is for them to dehydrate. Chicken broth can help keep them hydrated and can act as an appetite booster. The warmth and aroma of the broth can also be inviting to a cat that doesn’t feel like eating.

Gerber baby food

It may sound strange, but Gerber baby food can be a lifesaver for a sick cat. Their stage one chicken or turkey flavor can act as an appetite stimulant, and the smooth texture can be easier for them to digest.

Boiled chicken

Plain boiled chicken is an excellent source of protein for a sick cat that won’t eat. Slice it into small pieces and mix it with their favorite wet food to encourage them to eat.


While not food, catnip can stimulate a cat’s appetite and help them to become more interested in food. Sprinkle a little bit of the dried herb on their food to make it seem more enticing.

Final Thoughts

When dealing with a sick cat that won’t eat, it’s crucial to be patient and try different options to find what works best for them. It’s also essential to keep them hydrated and take them to the vet if their condition persists. With a little bit of creativity and effort, you can help your furry friend get back on their feet in no time.

Do Cats Feel Unwell After Vaccinations?

Cats are mysterious creatures that are known to hide their true emotions. So, it’s not easy to tell when they’re feeling unwell. However, it’s common to wonder if your cat feels sick after receiving vaccinations. In this section, we’ll explore the topic, and hopefully, you’ll come away with a better understanding of how your furry friend feels after getting vaccinated.

What Happens After Cats Receive Vaccines?

Vaccinations help your cat develop immunity to a variety of diseases. However, the process of developing immunity can cause some cats to feel under the weather. Some cats develop mild symptoms such as a fever, a slight decrease in appetite, or lethargy. It’s nothing to worry about, and the symptoms usually go away within a day or two, but it’s essential to keep an eye on your cat.

How Long Do Symptoms Last?

Most cats recover quickly from vaccine-related symptoms. Symptoms typically last for 24-48 hours, but in rare cases, they can last for several days. If your cat continues to feel unwell after two days, it’s best to contact your veterinarian.

Can You Do Anything to Help Your Cat Feel Better?

If your cat is feeling unwell after vaccination, there are a few things you can do to help them feel more comfortable. First, make sure they have access to plenty of clean drinking water. Providing extra food is not recommended, as it may cause digestive upset. Encourage your cat to rest, as this will help them feel better faster.

When Should You Contact Your Veterinarian?

cat won't eat after vaccine

Although mild symptoms are normal, it’s vital to keep an eye on your cat and know when to contact your veterinarian. If your cat experiences any of the following symptoms, you should contact your veterinarian immediately:

  • Severe lethargy or weakness
  • Loss of appetite and not eating for more than two days
  • Persistent vomiting or diarrhea
  • Swelling or redness around the injection site
  • Difficulty breathing or wheezing


We hope this section has given you insight into the topic of cats feeling unwell after vaccination. It’s normal for some cats to experience mild symptoms for a short period after vaccination, but if the symptoms continue or become severe, it’s crucial to contact your veterinarian. Remember to keep an eye on your furry friend and provide a comfortable environment to rest and recover.

How to Make Your Cat Feel Better After Vaccines

Getting vaccinated is essential to keep healthy and disease-free, and it’s the same for our feline friends. However, like humans, cats can experience side effects after getting vaccinated. If your cat is feeling sick after a vaccine and refuses to eat or drink, don’t worry. Here are some tips to help them feel better:

1. Give them Space

After getting vaccinated, your cat may be in pain and feeling unwell. Give them some space to rest and recover from the injection. Avoid playing with them and let them sleep without any disturbances. They need the rest to recharge their energy.

2. Keep them Hydrated

It’s important to keep your furry friend hydrated, especially if they’re not eating. Offer them water or some chicken broth to keep them hydrated. You can also use an oral syringe to feed them a liquid diet. Don’t force them to drink or eat – it can make them feel more stressed and sick.

3. Apply Warm Compress

If your cat is experiencing swelling or pain at the injection site, use a warm compress to soothe the area. Wet a washcloth with warm water and gently place it on the injection site for 5-10 minutes at a time. This will help reduce the swelling and discomfort.

cat won't eat after vaccine

4. Make Them Comfortable

Ensure your cat is comfortable by providing them with a warm and quiet place to rest. You can also use soft blankets or cushions to make their bed cozy and inviting. Providing a warm and comfortable bed will help them feel better and recover faster.

5. Monitor Your Cat

Keep a close eye on your cat and monitor their health. If they’re not eating or drinking for more than 24 hours or show signs of lethargy, vomiting, or diarrhea, contact your veterinarian. They can offer further advice and treatment to help your cat feel better.

In conclusion, vaccines are essential for our feline friends, but it’s normal for them to experience side effects. After vaccination, give your cat some time to rest, keep them hydrated, apply warm compress, make them comfortable, and monitor their health. Your cat will soon recover from the vaccine’s side effects and back to their healthy, happy self!

Is it normal for my cat not to eat after shots?

If your cat won’t eat after a vaccine, you’re probably worried, and that’s normal. But let us tell you that it’s not uncommon for cats to lose their appetite after getting a shot. Your kitty probably got injected with a non-contagious strain of the virus, which triggers the immune system to fight it off and develop the necessary antibodies to protect against it in the future. However, this process can make your cat feel a bit under the weather and result in a loss of appetite.

How long will it take for my cat to start eating again?

It usually takes a day or two for cats to regain their appetite after a vaccine. However, in some cases, it may take up to a week, depending on the severity of the reaction and the type of vaccine given. If your cat still refuses to eat after several days, it’s crucial to seek veterinary attention to rule out any underlying health issues.

What can I do to help my cat eat after shots?

There are a few things you can do to encourage your furry friend to eat after vaccination. First and foremost, keep their meal schedule consistent and try to stick to their regular diet. If possible, warm up the food a bit to make it more palatable. Also, try hand-feeding your cat and providing smaller, more frequent meals throughout the day. You can also mix in a bit of wet food or chicken broth to entice your cat.

When should I be worried about my cat not eating after shots?

While it’s common for cats to lose their appetite after getting vaccinated, it’s essential to monitor your cat’s behavior closely. If they show any signs of lethargy, vomiting, diarrhea, or other unusual symptoms, it’s crucial to seek veterinary care. Additionally, if your cat hasn’t eaten anything for more than 24 hours, contact your vet for further advice.

In conclusion, it’s entirely normal for your cat’s appetite to decrease after getting a shot. However, if your cat isn’t eating for an extended period or shows any other concerning symptoms, it’s best to seek veterinary care. Remember to be patient and supportive, and your cat will be back to their normal self in no time!

Symptoms of Vaccine Reactions in Cats

As a responsible cat owner, you want to ensure that your furry friend is protected against dangerous diseases. One way to do this is by giving your cat vaccines. However, just like with humans, vaccines can cause reactions in cats. Here are some symptoms to look out for:

Mild Reactions

Mild reactions are the most common and usually occur within a few hours of the injection. Some symptoms may include:

  • Lethargy
  • Loss of appetite
  • Mild fever
  • Swelling at the injection site
  • Sneezing or coughing

These symptoms should clear up within a day or two. However, if your cat’s condition worsens or doesn’t improve, it’s important to contact your veterinarian.

Moderate Reactions

Moderate reactions are less common but can occur up to a few days after vaccination. Symptoms may include:

  • Vomiting or diarrhea
  • Hives or itching
  • Persistent fever
  • Swelling of the face and/or paws
  • Difficulty breathing

If your cat experiences moderate reactions, contact your veterinarian immediately. They may recommend treatment such as antihistamines or steroids.

Severe Reactions

Severe reactions are extremely rare and occur within minutes after vaccination. Symptoms may include:

  • Collapse
  • Seizures
  • Difficulty breathing
  • Anaphylaxis

If your cat experiences any of these symptoms, seek emergency veterinary care immediately. This kind of reaction is a medical emergency and can be life-threatening.

In conclusion, vaccines are an important part of protecting your cat’s health, but it’s important to be aware of potential reactions. Keep an eye out for mild, moderate, and severe reactions, and always contact your veterinarian if you’re concerned about your cat’s health.

How Long Does it Take for Side Effects of Cat Vaccine to Go Away?

When it comes to getting your feline friend vaccinated, it’s always important to expect some side effects. They might not be the most pleasant thing in the world, but they do play an important role in ensuring your kitty is protected from common illnesses. From a loss of appetite to fever and lethargy, side effects are pretty common, and cat owners should give them some time to subside.

So, how long does it take for the side effects of cat vaccines to go away? Well, that depends on several factors such as the type of vaccine administered and the cat’s health status. Some felines might get through the vaccination round with minimal complaints, while others might take longer to bounce back to their usual selves.

Typical Side Effects

The typical side effects of cat vaccinations include a loss of appetite and lethargy. In most cases, these side effects shouldn’t last more than a day or two. If your kitty still refuses to eat after the third day, you might want to give the vet a call and monitor the cat’s behavior to see if there are any other issues that need addressing.

Serious Side Effects

As mentioned earlier, the common side effects of cat vaccines are usually nothing to worry about. In rare cases, some felines might experience more serious side effects such as vomiting, diarrhea, or a fever that lasts over 24 hours. If your cat exhibits any of these symptoms, you should immediately contact your vet for guidance on how to provide relief.

How Long is Too Long?

While it’s normal for cats to experience some side effects after receiving their vaccines, it is important to know when the symptoms last too long. If your cat seems to be struggling even after the third day or is experiencing severe side effects, don’t hesitate to contact your vet. You know your furry friend better than anyone else, so keep an eye out for unusual behavior that might indicate a problem.

In conclusion, vaccines are essential to ensuring your cat’s health and well-being. While side effects can be a bit of a hassle, they are nothing to worry about as long as they subside within a reasonable amount of time. Always monitor your cat’s behavior and be sure to call your vet if you notice anything alarming.

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