Our shelties were always tangled in the "butt" area.. because the fur is so coarse there. It really hurt them to have it brushed out; now we get it trimmed at the groomers, it's just easier that way. My mom calls it "bustle butt" because sometimes it would stick out if they were laying on it funny But if you can get him used to it, brushing him there would be a big bonus for when the coat grows in fully