Great news! yes, its is definately a game to her. Try to avoid her getting into the habit of it... I have that same game between my Pouncer and Abby and lets just say meowmie is tired of breaking up the fights that break out over those two! Abby does not even trust Pouncer to come near her anymore, and SHE starts a fight if he even walks past her. So do try everything to discourage Abby from picking on Misty. My best suggestion would be ot get a second kitten to keep Abby entertained and leave Miss Misty alone I am not brave enough to have a single kitten, I always get them in twos.