[Ellie May]

The American College of Veterinary Dermatology should have a listing on thier website.

I think they are usually given weekly, but not sure. It might vary depending on how far along in the treatment you are.

Yes, for long-term management, do allergy testing to figure out what the problem is and then treating it with injections is a good way to go. They can occasionally make the problem worse though. Best to talk to a derm about your options.