Moses had one on his face the size of a quarter and overnight it exploded in growth. See pics in this old thread: Facial Hot Spot (graphic pics)
He hasn't had one since. I keep vetericyn on hand for wounds including hotspots.
My goodness! Poor dog.
Harley has had a hot spot for about 4 days. I didn't notice it at first, because it just looked like matted fur. Then I started to notice the hair loss.
Varick vom Haus Jeffery
Dark Sable, intact male
DDR/West German Show Lines