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Why is my cat overgrooming & losing fur? Vet diagnosis & costs.

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Mediumhair | Female | spayed | 6 years and 8 months old | 13 lbs

My cat suffers hotspots from excessive grooming, her belly and inner thighs missing fur. I'm aware it's a secondary thing to some other issue. What all would a vet do to figure out source of the problem? Allergy testing is one, is there a such thing as food allergy testing? What other things might be done? Am low income, don't drive, want to get prices from vets for various things they might do but most won't give pricing without seeing her, even current vet who's seen her before for same issue.

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2 Answers

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on April 9th, 2018

Hi, thanks for using PetCoach! Poor Luna! I would have Luna on year round flea treatment. Dogs and cats that are flea allergic, meaning have a severe reaction to the saliva, will break out this bad from ONE flea bite. She should have a skin scrape done to rule out mites. There no good test for food allergies. It is best to do food trials. To save money and Vet visits for Luna I would bite the bullet and immediately go for a prescription hydrolzyed diet like Hill's z/d or Royal Canin HP. She may need steroids or antibiotics to get her comfortable during this outbreak. Cats can be maintained on off label use of antihistamines and apoquel. And some cats do well on atopica. Omega 3 fish oils never hurt either. It is hard for Vet who have never examined Luna's skin to give you an estimate over the phone. Skin allergies are expensive but once you find the right medication and food regime Luna will likely do well. I hope this helps! https://www.petcoach.co/canigive/cat/zyrtec/ https://www.drsfostersmith.com/product/prod_display.cfm?pcatid=24785

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    Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on

    Thanks for using Petco Pet Education Center, formerly Petcoach! This is possibly due to allergies. It really comes down to figuring out what is causing her allergies so that they can be treated or the specific allergen avoided. A secondary infection is likely and also needs to be addressed. There are many things that can cause allergies though in most cases they can be broken down into 3 big categories: flea, food and environmental allergies. Allergies are usually worked up in a stepwise fashion starting with flea allergies as this is the easiest and cheapest to take care of. If not on a flea preventative, then it would be a good idea to get started on one. If already on one then it would be a good idea to change to something else (there are many new products out in the market). If not improved in 1-3 months then it is time to move on and check for food allergies by switching to a novel diet (new protein and new carbohydrate). If that does not seem to be the issue then you are left out having to check for environmental allergies which require blood and/or skin tests. Allergies can be very frustrating to deal with at first but so rewarding at the end when we are able to treat them effectively!

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