Hello all ... i have a male chow chow dog in about 2 years old , untill now everything was ok , it was very frendly dog , who used to do no harm to nobody . in the past month the dog is just starting to attack everybody with no reason , it is frendlly all the time and very active , but sometimes when some one comes neer him he just start to attack , all the time . we live in n.y in a small house with a balcony and the dog go outside every day , he never been maid with a female before ... does anybody can tell me whats going on here ? is there any way to prevent the next threat ( attack ) ? any comment will be more then welcome . thx !