Hi everyone, I have a kitten that is 5 month old. He's a ginger male, former stray, named Kiddy. He is very energetic, active and love to play with toys and never seem to get tired. Just recently a friend of mine ask me a favor to foster this skinny, tiny black female kitten he found in his yard. I took her in and planned to find her a new home. But I grew attached to this kitten. I have no problem on introducing her with Kiddy, there is no hissing or growling even from day one. But the problem is that he seems to don't know how to play nice. He stalks, chase, pinned down and wrestle the poor tiny kitten until she growls and hisses. The kitten actually don't mind playing with him, but she just hates it when Kiddy bites her and wrestle with her and won't let her go. I tried squirting water, tossing a toy near them, shaking can of coins, he got startled, but not even a minute later he starts to stalk her again. He could do it forever. So please everyone, give some advice how to make him treat this new kitten (doesn't even have a name yet), more like his playmate rather than a toy. I tried searching for other threads but most of the cases are about cats who are fighting or can't tolerate each other. These guys are fine until Kiddy starts to get too playful. I really want to take care of both of them. 
