here you go you cant leave the home with out them so heres a way you could try, copied from another site.
Stick your finger up its butt.
No, really. I was told this by a master of strange factoids,
Chuck Palahniuk. Yeah, the guy who wrote Fight Club. Apparently that's just about the only way to get those big guys with the locking jaws off. Shove a finger as far as you can up its butt. The dog's jaws will unlatch and you can either run or kick it. I guess it shocks the dog enough, as long as the dog hasn't had this pulled on it several times before (or has a rather icky owner).