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My dog's hair is falling out with crusty skin. Is it an infection?

Updated on September 23rd, 2025

Pet's info: Dog | Cocker Spaniel | Male | neutered

Hello I have a question my dog has like a thick crust of mucus on his hair and today we checked and his hair is falling out on that area is that an infection ?

3 Answers

Most Helpful Answer

Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on July 25th, 2017

Poor Buster! Yes, from the photos it certainly does look like he has a skin infection of some kind. This can occur on its own, or due to an underlying skin problem such as allergies or mange. I would recommend taking him to the vet to have this checked as soon as you are able to, since he will likely need prescription antibiotics to treat the infection.

In the meantime, you can try bathing him thoroughly in a chlorhexidine-based dog shampoo if you like - this should help to remove the crusty discharge and make him a bit more comfortable until you are able to see the vet.

1Pet Parents found this answer helpful

Related Answers from Veterinarians

Answered By Megan, DVM, CVA
Veterinarian
Published on April 13th, 2018
Poor Max! This could be a bacterial or fungal infection or even an auto-immune disease. Since it is spreading quickly, I would strongly recommend to have your vet take a look. He is likely going to need some antibiotics, possibly anti-fungal meds, and maybe even some steroids. Unfortunately, there aren't any good over the counter meds to help cure this. I hope this helps!
1Pet Parents found this answer helpful
Answered By Jessica Desrosiers
Veterinary Technician
Published on December 13th, 2018
It's definitely time to get Cooper into your vet if the affected area is spreading. Issues such as skin infections from bacteria, yeast, etc, or parasites such as mange can be potential causes of crusting, hair loss and irritation. Other issues such as food allergies or metabolic issues may cause similar symptoms. A vet visit along with bloodwork or samples taken of the affected areas can help narrow this down so the correct treatment can be given.

In the meantime, placing an Elizabethan (cone) collar or T-shirt on Cooper may help prevent him from being able to scratch the affected area and reduce some irritation until you can be seen by your vet.
1Pet Parents found this answer helpful

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