I own a 3-mth-old Lab pup and my housemate owns a 7-mth-old Jack Russell. As of late, I have begun investing in interactive toys, toys that make my pup work for a reward (i.e. food). These toys -- Kongs, bones, etc. -- are causing big problems. Tha Jack Russell becomes protective and guards the toys with great ferocity, whether the Lab poses an actual threat or not. The scene often escalates to the point where we have had to seperate the two dogs, who are best friends otherwise, for great lengths of time. We have tried providing them each with their own toys, but the Jack Russell often claims the Lab's as well or still jumps the Lab when she so much as walks by. Is there any way to ammend this problem without completely stopping the use of these toys? It happens with pieces of wood, too. I can't keep all the toys up... I would have no furniture to sit on!