My mother's dog went thru this a few years ago. It is most likely her hormones and is a false pregnancy. I think it happens around 2-3 months after their last heat. Don't take the toy away from her, it could really upset her. She might also start to pant, shake, and cry. Do an internet seach on Pseudocyesis for more info. You should also take her to the vet. He will probably place her on hormones for now, but he will also likely suggest she be spayed. Good Luck
