I voted before I read your post. I voted one because each dog has one collar. Should have voted three instead. My Goldens wear their collars and identification all the time. Lilly's is pink, Honey's is purple and Zipper's is orange. Murphy doesn't wear a collar (she's inside almost all the time) because she has a reoccuring cyst on her neck and the collar irritated it a lot, so we just removed her collar.

Logan