Thank you for your replies.
I did ask the vet about mange and was almost laughed at.
It was red and inflamed, now it is no longer, but the spot has remained lighter in color and you are right, hair loss, I hadn't realized that!
It does not itch, nor does it seem to bother him.
When it was red I quickly ordered and used
Those took care of the redness, but this remains. I have stopped using them, because I don't want to overdo anything on his skin, and the spot has not gotten any bigger.
Would you leave it alone, or continue the Duoxo?
Anyone know if the pigment will return?
Here is a closer look: