We got two females, A bengal and a serengiti at the same time and age (12 weeks). At 8 months we introduced a male bengal of 12 weeks and all was well. Now Chaka of 11 months is beating up on her sister almost every day. Myah sustained an eye injury in one of the bouts in the begining, So I consider the cats are not playing. What can I do? I was considering putting maple syrup on Chaka as punishment, I'm sure she would not enjoy cleaning it off, But I don't know if cats are capable of learning. This has got to stop. Any suggestions? TIA