I sound like a broken record - I suggest you get a mace-like spray for dogs called Muzzle. It is legal and you can get it on the web. Just google Muzzle for dogs. I had to get a canister when a dog approached me at the park - unleashed and growling. I have never had to use it but I feel better when I am carrying it. Also, my neighbor had a border collie and it was really nasty and aggressive. Tried to bite my husband in OUR yard.
__________________  RIP my darling little Gina |