We have a 3+ year old female GSD. Her name is Bella and she is absolutely our best dog ever. Earlier this year, she started developing pink spots right above her lip. We took her to the vet and she said she had no idea what it was and to try changing food first. We have done that to no avail. After taking the antibiotic Cephalexin for about 2 weeks, the spots go away. However, this is their third appearance. We last saw them mid April but they came back 2 months later. The vet said she'll have to do a biopsy to find the exact diagnosis. We'll do that if we need to but were hoping to find an answer before stressing Bella out. I've seen different diagnosis after googling, like auto immune deficiency, pyoderma or even simple allergies. If we do not treat with medicine, they seem to get worse, enough where she'll bleed when she drinks. We'll continue with the vet (but likely try to find a better one) but welcome any ideas. We're in southeast region of Cincinnati.