My cat has lost his hair on his ear. Pet's info: Cat | Mixed Breed | Male | neutered | 5 years and 3 months old | 10 lbs

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 his 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!

Thanks for using Petco Pet Education Center, formerly Petcoach! This is possibly due to allergies. 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!

Some of the most common reasons for Indica's skin issues are related to allergies (to fleas, food, or the environment), ringworm or mange. When cats become excessively itchy, they can scratch to the point of developing a skin infection. Make sure that Indica is receiving a high quality flea preventative (such as Advantage or Revolution) monthly. He should be examined by his vet to try to determine the cause of the hair loss and skin lesions, because antibiotics or anti-itch medications may be needed. I hope that he's on the mend soon!

Why is my cat losing fur on his ear and scratching constantly?

Updated On September 23rd, 2025

My cat has lost his hair on his ear

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4 Answers

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Answered By Ricardo Fernandez, DVM 191

Veterinarian, Veterinary Oncology Resident

Published on August 13th, 2017

Poor Panda! I can tell by the look of his ears that he has been scratching at them quite a bit causing some self trauma which is evident by the red spots (erythema), hair loss and inflammation. A very common cause in cats would be ear mites. This is a very easily treatable condition that your veterinarian would be able to dignose and treat effectively. Best of luck!

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Why is my cat losing fur on his ear and scratching constantly?

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