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Why is my new cat hissing, drinking excessively, and covered in scabs?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 5 lbs

Newly adopted from shelter 11 month old female spayed cat, already have a 2 year old spayed female cat at home, new cat Missy hisses and growls anytime she sees Onyx, but Onyx doesn't do it to her. Missy has scabs from her head all the way down her spine, drinks water constantly, only thing she does all day is drink water, giver herself a bath and sleeps. My concern is her constant drinking, scabs, and behavior, any ideas on fixes?

1 Answer

Most Helpful Answer

Justin Plunk, DVM

Answered By Justin Plunk, DVM

Veterinarian

Published on June 13th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach!

Excessive thirst is always a cause for concern, and there are numerous causes of it. I would highly recommend having Missy seen as soon as possible for some blood labs and a urinalysis as well as assessment of her wounds. It is possible she has nothing serious, but she could have something like an abscess forming which would need drained and flushed under sedation in addition to antibiotic therapy. As for the behavior, environmental enrichment is a must in a house with a cat, especially if more than one cat is in the household. Always have one litter box per cat plus one, and use Feliway to aid in calming which is available at PetCo. Discuss further enrichment with your primary care veterinarian.

I hope this helps!
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