Bernice is a bc/queensland mix (we think) and she loves to help around the house. it really pleases her to do a job whether it be take something to dad or open a door for me.
i do not know a lot about service dogs or what is required of them, but know that a bc loves it's owner and wants to please them. they also love to work, so if those are things that service dogs need, then i would guess they would be good. the only thing is, they may be too high energy for a service dog, but i would speak to your trainer about that.