Cat somewhat gone crazy because of stray cat?

Cats are really hard to figure out sometimes, I've got five and two are a bit crazy. Time usually fixes these kinds of things, but she can try things like getting them to play together, giving them special treats together. One thing that helps mine to like each other better is a lazer, I'll get one of them chasing it around, then the one that is upset will want to join in. sprinkling dried catnip on the kitchen floor works well for mine, before I know it they're all in there rolling in it and purring. She can try sitting with the cat in her lap and talking gently to her about why she can't act like that :)