Hello! My German shepherd is constantly scratching and he started to lose hair on his ears. We went to the doctor when I saw red skin on his belly and vet said that I have to give him allergy pills but he didn’t do any test ! He said that’s it’s not a big deal but my dog is still scratching so I want to do this test now. I heard that u can do it at home or send samples of hair or saliva to them? Can u recommend any kit? I want to know what allergies he have exactly if for food then what kind of food etc thank you !