Dear Jennifer: I had the same problem with Bindi. She was in a shelter for a long while before she was sent to a rescue organization where she lived in her crate most of the time, for about 4-5 more months. I have had her for about a month and just now she is beginning to blossom. I started with tug a war and she really started loving it. I never pushed her to play, I am sure being in a cage does something to your mind, and also never being played with doesn't help either. Our patience paid off, she now is a very fun loving dog. I bet they don't know what is the right thing when they first come to a new home. It will take time and I am sure your pup will begin playing. I was discouraged at first too, but I relaxed and that really and just waited and it helped. Two days ago, we actually had a break through, she played with her toy when she did well in training!
Don't loose heart, your pup will come around too, I am sure of it, just be consistently the leader and let her be her. I hope my experience helps you. I really did nothing professional with Bindi, and it all worked out.
Love, Sharon Jean

thanks sharon jean!

...it is nice to hear similar things. last night was pretty exciting for luc - he not only chased the squeaker toy (sort of) AND a ball, but he would pick up the ball (pawing it out if it got stuck in something) in his mouth!!!!