My cat is lethargic and not eating since new kitten. Is it serious?

It sounds like poor Olive is sick. Anorexia and lethargy can be signs of many illnesses such as a systemic illness, infection, inflammation, or injury. It's actually quite serious when a cat isn't eating, and I would take her into the vet as soon as possible. The vet can diagnose the cause of her symptoms, and can treat her for it. Please take her into a vet. Best of luck.

No this isn't normal and Scribble has to see a vet immediately. It's extremely serious she isn't eating, as when a cat doesn't eat for longer than 72 hours, they develop a fatty liver which is fatal without treatment. While the stress of having a new kitten can cause a cat not to eat, it shouldn't last this long. I'm concerned there is something more serious going on with her, such as kidney disease, liver disease, dental problems. or even cancer. She needs veterinary care now, please take her into a vet right away.

Thank you for submitting your question regarding Kenji. The stress of the new kitten could have started his symptoms, but most of the time a cat will adjust to new circumstances in the amount of time you have described. If it is not stress, he may have contracted an illness from the kitten. I recommend that he sees his veterinarian again or you can consider seeking a second opinion. Bloodwork would be warranted at this point. Cats can actually develop severe liver disease if they go extended periods without eating. I hope this information helps!

This is a medical emergency, and Blacky has to see a vet now. If a kitten goes longer than 72 hours without eating, they will develop a fatty liver, which is fatal without treatment. Leaving her like this is cruel, and you need to find a way to afford a vet. Borrow money from family and friends. See if your vet accepts payment plans. You cannot treat this at home, please take her into a vet right away.

It sounds like Akira may be sick, and it is very serious when a cat won't eat. If they go long enough without eating (around 72 hours), they will develop a fatty liver. A fatty liver is fatal without treatment, so you want to avoid this. Have her seen by a vet first thing in the morning.

I would bring her in right away for an exam. None of this is normal although stress can have a huge impact on kittens. These young guys can't go very long without food and I would surmise that is why she is so weak and lethargic.

Thank you for contacting Petco Pet Education Center, formerly Petcoach with your question about Kong. When a cat doesn't eat, it's extremely serious. That's because if the cat goes long enough without eating (about 72 hours), they will develop a fatty liver. A fatty liver is fatal without treatment. The fact that he won't eat or use the litter box tells me he is quite sick or injured. I would consider his symptoms a medical emergency that cannot be treat at home. Please take him into a vet immediately. Best of luck.