Originally Posted by Loki Love
I'm wondering if the fact the new girl isn't spayed is also having an effect? Dogs pick up on the oddest things..
I'd feed them completely separately at this point - different rooms. Your male may not appreciate sharing his space, food, toys, etc with this new girl. I'd also make sure you spend 1 on 1 time with each of them - train seperately, etc.
I do agree with getting a qualified behaviourist in at this point - big dogs can lead to big problems if not nipped in the bud immediately.
+1 whole heartedly agree. Sometimes 'behaviourists' are hard to find so you may need some obedience training. But whatever you choose, make sure they are referred by someone you trust and have experience with big powerful dogs.