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Why are my male dog's testicles red and discolored? When to see a vet?

Updated On September 23rd, 2025

Pet's info: Dog | Australian Cattle Dog | Male | unneutered | 3 years and 1 month old | 20 lbs

This is the second or third time my Red Heeler has had this issue (see attached picture) The first time it was on both sides of the testicles which went away on its own. This time it is only on 1 side. What is this?

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1 Answer

Most Helpful Answer

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Answered By Jessica Keay, DVM

Veterinarian

Published on August 2nd, 2017

Often this type of discoloration can be due to a dog licking the area, as saliva left of the fur can cause a staining that looks reddish in color when exposed to air over time. We can also sometimes see this with yeast or bacterial infection. If the skin under the discolored fur has any crusts/scabbed areas or pustules (look like whitehead zits) or circular patches of dry skin then a vet visit is recommended as these are signs of skin infection. If they do not you can try using a medicated shampoo such as Malaseb shampoo on the area but if it is not improving or worsening then a vet visit would be recommended.

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