Here is a dog sport that we haven't tried. I think that Maggie would love this:
It is a Bernese participating in the sport of Schutzhund. I didn't know that Bernese were used as Schutzhund dogs and I don't know if Maggie and Bosley would be very good protection dogs. Maggie would, however, love to chase someone and be allowed to bite at the bite sleeve. She also loves to bark, so when combine all of those things, she would love it! She also would want to have some cuddles from the "bad" person after she was done chasing and biting him.