Why does my kitten have no appetite and watery stool after vaccine?

Some poor appetite can be considered normal after vaccinations. Vaccines stimulate the immune system to help protect your pet from common diseases they could be exposed to. Vaccines can sometimes cause minor changes in appetite or behavior. Usually I tell clients some decrease in appetite and decreased activity can be normal for 24 hours but for any issues lasting more than 24 hours they should call me ASAP. Some of the major issues (although rare) associated with vaccine reactions are trouble breathing and anaphylactic shock. If you notice any trouble breathing, severe lethargy or swelling of the face or at the vaccine site you should contact your veterinarian as soon as possible. If the poor appetite is still an issue after 24 hours or If any other issues are going on contact your veterinarian ASAP.

Hello, sorry to hear about Cello. This could be considered a type of delayed vaccine reaction and can be either due to pain at the injection site or a direct reaction in her stomach. If she is vomiting a lot, then I would definitely recommend she is seen by a veterinarian to avoid severe dehydration. However, there is a chance that this may pass on its own if you monitor her for the rest of the day. On the other hand, there are other things that can cause a decreased appetite and vomiting such as foreign bodies, worms, and viruses. So if you think Cello is feeling ill, then consider visiting your veterinarian sooner rather than later. Hope this helps.

Hi there. Some pets may have some mild GI upset after vaccinations, so this certainly could be normal. If he's acting normal otherwise (eating and drinking fine, no vomiting, etc.),. then it should be okay to just monitor for now. If it doesn't resolve in the next 2-3 days, or if he develops any other symptoms such as vomiting or not wanting to eat, then I would recommend having him checked by your vet to make sure nothing else is wrong.

Poor Hattie! It’s possible the vaccines are causing a reaction. It could also be related to any dewormers she may have received or it could be unrelated entirely. I recommend to play it safe and have her examined by the veterinarian today. If they suspect a vaccine reaction, they may adjust her protocol in the future to try to avoid this from happening. I hope she starts feeling better quickly and please feel free to post any additional questions.

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Lily! Lily is likely having a reaction to the vaccines. If she has a fever she needs to see a veterinarian. When animals have fevers they do not want to eat. Your Vet, after their exam, will likely give her subcutaneous fluids and steroids. Once the fever and the reaction has subsided Lily will likely eat. There is nothing to do at home besides wait out the fever and that may take to long. Cats can not go more than 3 days with out eating or they get sicker. I hope this helps and I wish you and Lily the best!

Hi, and thanks for your question. This is a quite generic but concerning presentation. Differentials are many, from vaccine side effects to any gastrointestinal diseases (infection/inflammations often dietary related) to any disease that can spread systemically (causing lethargy for example) like infection, and anything that can cause pain/discomfort. The approach must be logic, starting from offering different kind of food. A check up is needed if inappetence lasts for more than 24hours. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!

These signs may be related to the vaccine, but it is definitively hard to prove. If that was the case the signs would be usually self limiting and resolving. Given the persistency and severity of the signs I would recommend a check up anyway. The second possibility is that the gastrointestinal system is affected by an infection, who got worse with the vaccine. It could happen that the infection was in a sub clinical stage before vaccination, not showing any sign at physical examination. Please do not hesitate to contact us more one forum or by requesting a consultation if you want to discuss it further.