I hate people like that. That's what happened with Maggie. The reason she probubly dosn't want the other dog playing with you if because she thinks you're all hers...

And if this happens, the other dog might get mad, and stressed, and start not getting along with the foster? dog. Have you been playing with the other dog seperatley? Does the foster? dog get along with your other dog???

Good luck with your new Foster? dog!!