A couple of my dogs have food allergies to specific proteins. They’re symptoms included ear infections, excessive itchiness, a red rash on tummies and a bit of hair loss (most likely from butt rubbing). I tend to feed individual proteins so that I can see a problem fairly easily. If someone is suddenly becoming itchy, etc, I switch to a different protein. It generally solves the problem. One of them had what looked like a seasonal allergy, but cleared after switching the protein. It’s so difficult to tell sometimes, you do have to look at all of the symptoms and timing.
