Hey everyone,
First poster here. I have a 6 month old Kelpie x Collie who has such a beautiful and friendly nature. When I take him to the off-leash park, which is everyday, he becomes hyper-focused on everything. He will greet all people and play with most dogs that let him. My concern is him getting a little aggressive when he has had enough. Even though he has instigated the play for 5-10 minutes, when he has had enough he will snap and go at the other dog. I think it's his way of telling them to stop. Should I allow this behaviour or tell him off and leash it? He has never hurt another dog when doing this or has he done this to any people.