My wife recently rescued a young female that is possible great dane pitbull and/or boxer mix. Our 3 1/2 month old Aussie just won't leave her alone. They are attached at the hip most of the time but Adele (the Aussie) just will not leave her be so that they can get individual attention. She continually wants to play and wrestle, we have tried separating them for individual time but Adele will only play bite and want to wrestle with us. Elli (the mix) is fairly laid back, just goes with the flow, loves to play fetch if left alone for a minute or two. My wife is really trying to make sure they both get adequate exercise each day and separated play time but she is starting to get discouraged....Please any suggestions are welcome.