yeah, she is definitely possesion guarding with certain items. When she plays with us, she would never growl, or do anything that would be preceived as aggressive. It will only occur with other dogs, and furthermore only a special few dogs that want the ball as much as she does. If another dog has a ball and is trotting around, she would be fine, and she would follow and wait. If the other dog were to put it down, then she would lurk and wait for the other dog to be distracted. If Roxy would go for a ball that has been layed down, and the other dog went for it at the same time, then she would jump at the other dog, and growl a whole lot, to try to deter the other dog. She was from a pet store, so I don't know if she had problems like that before. The day care's position is that they don't want "special needs" dogs ; where they can't do certain things, because roxy doesn't like it. I guess I can see their perspective. We are supposed to meet with a dog trainer this weekend, to see if they have some good techniques. I'm starting to think that this behavior is more of a symptom, then the actual problem. We don't have really good obedience with Roxy, in a busy situation, where if her attention is focused on something else(off leash), it is difficult to get her to focus on us, and listen/obey. Maybe the problem is more that Roxy needs to know that listening/obeying is the number one thing. I don't think that is the case with Roxy. We have taken her to puppy obedience class early on, but then we have been bad about keeping up the training.

Thanks for all your help.
-Sony