initiate it yourself first, play a little gentle tugging and toss and catch the toy yourself, play some mroe tugging etc. Don't throw it for her until she knows she's going to have fun with YOU when she has it. It's got to be you rather than the toy that is fun, or else she'll just go have more fun with the toy alone! Toss it about and play tug, but don't push for fetching yet, cos she sees no reason to bring it back to you yet
