My Lab puppy, 11 Months suddenly shows crazy aggression towards other dogs while on a leash.
I take him hiking regularly and have 3 other dogs who he loves and plays well with.
He has had some training, can heal, sit, lay-down, high-five, stay (for short amount of time) has great recall on a hike unless chasing deer or rabbits.
Please give me advice on what to do. I'm worried that if he ever left my yard he would kill someones dog.
Shyrel