Welcome to Pet Talk Madelyn. Unfortunately some cats will never get along with each other. I have 4 males and my oldest boy Storm is very jealous of my youngest boy Cirrus. I think he only terrorizes and chases him when I'm home but I'm not sure. I've just learned to live with it and some days are better than others. I sometimes have to give Storm a time out and separate him in another room for a while. Hopefully they'll learn to get along better some day.

How long have you had Charlie? I've only had Cirrus for a little over 9 months now. Good luck and please keep us updated.