Gas or electric?
EDIT: Dog owners, I need help. I have a 3-4 pound papillon that is absolutely psychotic. It has 3 knots in its hair, and I cannot get them out. If I get near the dog with scissors or a matte comb, it goes on a rampage and starts screaming/biting. The bites are pretty painful and can draw blood, even with gloves on. What's the best way to handle this?