I just noticed this morning that Badger has a bald patch and some porphyrin around his left eye. As far as I know, he is healthy otherwise but I don't know how serious this is. It could be an allergic reaction to the tiny bit of dog biscuit I gave him yesterday-if it is, do I need to take him to the vets? Or shall I just observe how he gets on for a couple of days and see if he acts different to his normal self? I do have antibiotics but that probably won't be given unless I am sure it is a bacterial infection.
I would appreciate any advice, thank you.