Where can I find similar meet ups in Arizona?

Dogs bite because they are scared.

I don't think you should consider getting rid of the dog because it got scared one day and bit your hand.

If the condition is Allergic Dermatitis, which it sounds like it is, than the thepetcenter.com says treatment for it can be: 'topical medicated soothing baths, ointments and sprays…'

This site is invaluable for stuff like this: http://www.thepetcenter.com/gen/itch.html#Allergic

Hope that helps.