Elizabeth, I am going thru the same thing with my older American cocker named Spice. He is 9 now and about 3 years ago he started having these issues with his skin, looks just like what yours has. At first it was a couple times a year, then it increased to just about all the time. I finally had him tested, had to drive 7 hrs to the nearest animal hospital that did allergy testing. Turns out he's allergic to just about every grass and weed out there, and dust. I have him on allergy shots now its been exactly one year since we started them. I have to tell you I almost gave up several times because he got worse at first, real bad, and I felt so bad about it. Actually he has only just in the past 2-3 months settled down, he still gets a couple spots now and then usually right after a shot, its once a month now for the shot. I also have him on a special pill, I'll have to get its name for you, but it's to prevent itching, and it really helps, because if he has a spot appear its the scratching that spreads it to other places on the body. I'll post later with the name of the medicine. I still use the medicated shampoo on him. My baby is on raw freeze dried food, a bit expensive but I'm trying everything I can to help. I also keep Spice's fur as short as I can (makes treating his spots easier) using scissors rather then clippers so as to not spread the condition, but I'm starting to think I may be able to let his fur grow back and he won't look so butchered up with the cut I've been giving him. I included a pic of his side after the allergy testing.