Well, this is where my frustration came into play. He's come trotting or running over before... to play. He and Layla will play tug together, also. So I had no reason to think there was going to be any trouble... or that he was upset. If he'd growled... or done anything other than what he'd done in the past, I'd have certainly stopped him. Going after food... it would be obvious to stop that. He's come over to join in play, though, hundreds of times without incident. He doesn't always... but sometimes he does. He isn't pushy about it, either. Sometimes my brain works in slow mode, especially when I'm in a flare. I'm in a flare now because of the moving stress. So maybe someone else could have reacted in that 2 seconds. I was just in a state of shock. If he was 'upset' I'd have expected him to growl at her or something. That was another reason I didn't react right off. However, I certainly won't allow it to happen again. I will assume he has bad intentions, and after we move and settle, I will leash him and play with her like this and correct his behavior. I don't usually play with her like this when he's out (to the point that she goes into her wild growling). It's usually something I do with her when he's crated and I have my 'alone time' with her. She doesn't always growl when you play with her. I honestly don't remember if she's done it in front of him or not. It's still not an excuse. He cannot be acting like that. She doesn't usually growl or anything when playing with him, either. He sounds like a bear cub, but she's quiet. She did make all kinds of noise when playing with our old lady mutt. I don't know why she's quiet when playing with him. They play really rough, too. She loves it. She doesn't know she's a 'small dog'.