We added a new member to our family, Luna is a kitten we rescued from a family where the mother has a terrible cat phobia. We have 2 other older cats Biney and Cleo. Cleo used to be a very pedantic cat but since the arrival of Luna she just turned into a monster. Biney on the other hand was this little hell cat that turned into an angel with the new arrival.
Biney brings the baby birds and mice and plays with her most of the day, they even sleep in a heap. Cleo just hisses slaps and growls at the baby, she even attacks her sometimes. Luna have been here for more than 2 months now, and Cleo's reign of terror seems to have no end.
Biney and Cleo are both 3 year old neutered females.
Do you have any suggestions on how I can rectify this situation?