i have a 15 week old keeshond mix puppy, and overall he has been really well behaved. he is mostly potty trained and is able to keep himself entertained with toys. however, he always bites my legs when we’re on a walk. he will not do it to anyone else if i’m walking with someone else. i have tried ignoring it, trying to calm him down, or even holding his mouth closed, but he seems to be getting more and more aggressive about it. i’m moving back to college in two months and i don’t want to worry about him biting my roommate’s legs if they walk him. it may also be his herding tendencies since he is an aussie mix. if anyone has any advice anything will help!