Petco Text Logo
Petco Pet Logo

Why is my puppy's itchy rash and sore from new food or collar?

Updated On September 23rd, 2025

Pet's info: Dog | Bulldog | Male | unneutered | 44.092 lbs

Puppy has a rash and on open sore on his neck it started in his arm pits after he had a change of food and a new collar it itches him but he does not seem to be in any discomfort

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on May 14th, 2017

A rash such as this one can be caused by various reasons such as fleas, mites ,fungal infection, bacterial infection and allergies. the first 4 needs to be ruled out before we start treating for allergies. in order to do that first de-flea Rugerrel with a high quality flea treatment such as advantage spot on, if it doesn't help - take him to the vet in order to check for/treat the other possibilities. If everything is ruled out, then an allergy treatment can be started. Usually an hypoallergenic food is a good way to start together with anti histamines. if it doesn't help - the best solution is a medication called Apoquel which treats allergies with great success and without side effects.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored