Q: "My dog has red, irritated skin under his nostrils and started getting scabs under his mouth in the winter, and I'm not sure why.

In the picture (see below), there’s only one, but there are numerous red circles like this." A: It looks like your dog has a mild case of pyoderma, a bacterial skin infection.

A: It looks like your dog has a mild case of pyoderma, a bacterial skin infection. It's still relatively mild, but if you look at an image search for this disease, you can see some pets that have ...