Things seemed to be going OK with both of them, but over the last couple of days Swisher (the older one) has become very aggressive towards Pebbles (the younger one).
We first noticed it at dinner time, when Swisher would get very defensive about his food. It's gotten to the point now where we have to feed them separately because Swisher will "Evil Eye" and intimidate Pebbles until she walks away from her food.
Today we had to break up two fights, and as far as we can tell, the older dog just "went off" on the younger one without provocation.
The second time he had her down and by the throat, and she was in quite a bit of distress. I was afraid I was going to have to use something to bust them apart, but Swisher finally let go of Pebbles after I *really* yelled "NO!" at him.
We're starting to get pretty attached to both of them, and like any dog, they both have their good points and bad points, but we're worried about leaving them alone together at this point.
Swisher is well-trained to walk, obeys all the commands we give him, but has gotten this aggressive streak all of a sudden.
Pebbles is a sweetheart, but is (still) a handful to walk, and can be stubborn at times. She's getting better about walking and obeying commands, and needs more work, but she's showing great promise.
Swisher would be a great dog for a one-dog family, but we really want two dogs.
We'll make the decision tomorrow, but I think we're going to send Swisher back to the rescue organization.......