Pet Sitting 8 Month Old Australian Shepherd
Hi, I've recently begun to pet-sit a client's 8-month-old Australian Shepherd, and right from the start, whenever I'd let him out of his kennel to go to the bathroom, he would lunge at me, jump up on me, and grab my arm in his mouth. He would do the same when I'd let him out back.
He's really good on walks, and listens to me on-leash, but as soon as I get him back to his home and take off the halter, he's everywhere; on me, jumping on his sister... etc. This past Friday, he lunged at me, grabbed my arm in his mouth and tugged, and then when I tried to tell him 'no' and turned away, he grabbed the back of my jacket and tugged on that instead.
I will be honest when I say that he scares me a little, and since I'm not his owner, I don't know what I can do to stop this behavior. According to his owner he is in training, so hopefully, that helps, but in the meantime, I can't continue coming home with bruises on my arms or, like Friday, a big bloody gash. Tips?