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My puppy is losing hair on his legs and won't let me touch them.

Updated On September 23rd, 2025

Pet's info: Dog | Australian Shepherd - miniature | Male | unneutered | 10 months and 19 days old | 28 lbs

Kato is loosing his hair. I find tons of hair on the floor everyday. But it’s like is not on the whole body, only certain points (on the legs). Today I noticed that one side of his leg is almost scalp, it has some scratches signs and he doesn’t allow me to touch it or to check it. It was hard to take the pics and he’s never acted like that, he is a very easygoing dog. He is fed with Blue Wilderness Puppy, which has no wheat or grain. Please need help.

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1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on June 25th, 2018

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!

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