That is Wendy the "bully" whippet - or another whippet that looks just like her. She has a genetic mutation which causes that mass of extra muscle. The owners never gave her anything at all to make her look like that. She'll live a shorter, slower life than her siblings but is pure whippet.
Its not wendy, its a different one. But drrrrrrrrrrr, the title is not suppose to be true!!! Its a joke.... If I gave my dog steroids, i wouldn't admit it and post a picture on a forum lool.