I have an abandoned Aussie Shepherd that is about 3 years old. He is fixed. He has some basic manners, but the thing that is baffling me is when we play on the swings he goes NUTS. He barks and barks and barks, throws his body in front of my granddaughter to make her stop swinging, nips at her feet and legs to stop the swing. I have never seen this. Is this shepherd behavior, wanting to make her stop moving? Is this an agression problem? He knows I am the alpha, but he is very headstrong. I am a bit stumped.
This is a farm dog that will stay outside all the time.