Teddy still tries to bite the brush when I get to his feet sometimes. I have found that keeping a supply of treats where I can get to them helps alot. I give him one when he is being good. His comb seems to work better for getting out tangles and he likes it better on his face than the brush. Keep working with him and try not to yell
and it will get easier. Oh and sometimes if he is just totally against it I try again in a little bit when he seems to be more relaxed!