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Why is my cat lethargic, not eating, vomiting, and drinking a lot?

Updated on September 23rd, 2025

Pet's info: Cat | Bengal | Male | unneutered | 7 years and 1 month old | 15 lbs

Hi. My 7 year old indoor un neutered male cat named Simon. Past 5 days he is not himself. Vomited 5 days ago.. little liquid maybe a green color..He seems to be slow., not playful self. Seems lower body or maybe legs sore.. little weak..just the way Im see him move getting up..ok to jump out of bed walk , won't eat. Just very little tuna and the broth only he'll eat. He seems to drink water .. alot more than usual...peeing okay.but no stools ( not eating) only once in last five days..small sto

2 Answers

Most Helpful Answer

Anna M., DVM

Answered By Anna M., DVM

Veterinarian

Published on March 14th, 2020

Hi there! Simon needs to be seen by the vet. Decreased energy and decreased appetite tells us that he's not feeling well. Drinking a lot more than usual makes me concerned about an internal problem such as diabetes or kidney disease. I recommend scheduling an appointment as soon as possible. Your vet will likely want to check a urine sample and run some bloodwork to determine what's going on, in order to determine the best course of treatment.
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Related Answers from Veterinarians

  • Answered By Ann Dion, DVM

    Veterinarian

    Published on April 30th, 2017

    Hello. It sounds like Tuxx is very sick. If there is a 24hour clinic in your area I recommend taking him now. He could have many conditions however both renal disease and diabetic ketoacidosis are possible from the history you have given, and these can be life threatening if not addressed. DKA could result in death tonight if he crashes. If tonight is not possible to get him to the vet just try to get as much fluid into him as possible without risking him aspirating (fluid going into yhe lungs) and offer any food he will eat. Good luck with him!

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    1Pet Parents found this answer helpful

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