I was disturbed and surprised yesterday to see our sweet Buddy acting quite mean towards my sister's dog Molly. She's also a shepherd mix, and a little heavier and more solid than Buddy. Molly comes over almost every day, and she and Buddy always play well together.

Yesterday though when my brother and I were doing some work in the yard with the dogs out there, Buddy almost looked like he was attacking Molly. Looked like he was trying to bite her throat. Maybe it was just rough play but it is uncharacteristic of him to be so aggressive.

I wonder if he still considers Molly to be some kind of threat to his territory. They play well inside the house, and usually do outside. I don't know what to make of it, but I guess we should keep a closer eye on them when they play alone in the yard.