My cat is tired and inactive after fleas. Should I go back to the vet?

Depending on the extent of flea infestation, lethargy is not at all uncommon. Flea bites can drain a significant amount of blood and nutrients from the body, so when a severe attack as occurred, what you are describing is very much expected. If the exposure was not significant, it is possible that Milo may just be having a reaction to the medication itself. If this is the case, he should come out of it relatively soon. If not, I would have him reassessed by your veterinarian that prescribed the drug. Hope this helps.

Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. It sounds that your cat had a thorough investigation at your vets. Some cats are lethargic and less playful when they have fever (I guess that was checked by your vet) or painful condition, for example muscle pain, joint pain, spinal pain and more. If his activity is not back to normal in 2-3 days I would suggest trying a short course of anti-inflammatory medications.

Oh no poor Blu! I'm so glad you got him home. It is possible that he was injured on his adventure, and he could be suffering from internal injures causing him to not move much, eat, or drink. I would have him seen by a vet immediately, he needs a physical exam, blood tests, urinalysis, and x-rays. If any injuries are found, the vet can discuss treatment options with you.

Fleas are never a fun surprise! Indoor cats can acquire fleas if they come inside on your clothing, through open windows, or on other pets in the household. Even though you have removed all of the adult fleas on Daisy, those adults have likely already laid eggs that will be impossible to remove. Flea collars (with the exception of the Seresto collar) tend to be very ineffective. It is possible that the collar may be affecting her negatively. Since Daisy has been relatively lethargic since you put the collar on, consider taking the collar off and using a high quality flea preventative medication, such as Advantage, Bravecto, or Revolution. Be sure to use one of these preventatives regularly for at least the next few months to break the fleas' life cycle, but preferably year-round. Cats can acquire tapeworms by eating fleas infected with tapeworms, so it may be worth taking a stool sample to Daisy's vet. If Daisy remains lethargic, stops eating and drinking, or develops any vomiting or diarrhea, she will certainly need to go to her vet for further evaluation. I hope that all goes well!

It's not likely to be a symptom of the fleas but it could be a symptom of the flea treatment you use, some of them can cause a side effect of lethargy and lack of appetite which usually does not last more than 24 hours. if by tomorrow Jax is not better, i would recommend taking him to your vet to get checked and treated.

There can be many causes for the sudden change in activity level, including unhappiness with the new food flavor, pain from arthritis or another source of pain, GI upset from food allergy or dietary intolerance, anemia, constipation, infection, among many others. I would keep a close eye on his food and water intake, and monitor his bowel movements and urinations. If he is not back to himself in 48 hours, or if additional symptoms develop, he should see a vet for and exam and appropriate diagnostics.

Hello. You should take the kitten in to be evaluated as soon as possible. Fleas do carry diseases that can infect cats & kittens, & if there are enough fleas, can actually cause anemia. If the kitten has not been wormed, then the presence of intestinal parasites such as roundworms can weaken a kitten further. Other infections/conditions are possible, so I do hope you can have him evaluated by your veterinarian soon. Thanks for using Petco Pet Education Center, formerly Petcoach.