Hi, there! What you're describing in your boxer sounds somewhat like what Harley has. His started out as white patches all around the perimeter of both ears. If you tugged on one of the little white patches, the hair would come out with the white "stuff"? and leave a tiny bald patch. We took him to several vets who suggested all sorts of things but, finally, after visiting a University vet hospital, it was determined that Harley had seborreah or psoriasis. We had to bathe his ears in a special tar shampoo and the problem was gone within a week or two. That was last summer and now, we've noticed that Harley has the same type of spots on his head. I shampooed them and the problem is clearing up. I don't know whether this will help you or not but good luck and please keep us posted. Have a super day!
Boxer Baby: Harley - born 12/27/98 - adopted 1/08/2000 - docked tail/natural ears/neutered - full of pee & vinegar!