+ GretchenM = 
I don't know, but dogs are weird.
A long time ago I got Ivory for the DP as he had really dry skin and I think he was using one of those deodorant soaps like Zest.
Bubba took a shine to Ivory. We now use Dove. (hold your breath here, kid) and Bubba keeps thinking since it is white that he might get some good old ivory.
He never gives up hope!!
+ GretchenM =