his ball drive is strong and when he goes to get the ball if another dog he doesn't know goes for his ball. he geos crazy jjust growling snapping and showing teeth. he doesn't bite but just chases the dog off.
i'm no expert but i think that may be okay. the other dog is getting the message like it should and going off. if another dog doesn't get the message there would be trouble, then those two couldn't be together in that game.
I take it that he is your malinois... they can be pretty thick headed at that sort of thing. Try to have him play with dogs he doesn't know until he gets along with no problem. Then try with the ball again. There shouldn't be a problem after that. My mal did that before, but I quickly corrected him, took the toy away and then they played fine. The next time my friend brought her dog over, they had no problem when the ball was thrown.
this has happened a few times now. usually it is when he goes for the ball and the other dog makes an attempt. the display of aggression is pretty bad. like i said nobody gets hurt but it's looks really bad.