Sirius Black's Service Dogs

What happens when you're ex-con Godfather decides he needs to be around to protect you? Shenanigans. Absolute shenanigans. On the bright side it turns out Dudley's not so bad? Plus Remus gets a job! So it can't be all bad! The Triwizard tournament is kinda throwing a wrench in the whole "everything's peachy" aspect though...