When we were first considering getting a second cat, I read a book that said that even if the first cat doesn’t like the newcomer, it will enjoy staring in disdain at the new one. Watching Reid at gymnastics, twisting her head from side-to-side over and over, I realized that if she gets nothing from having her hair long she’ll always have a “toy”. Ponytails tickle your cheeks, don’t ya know?
Incidentally, for a long time Clio stared at Mars and Leo in disdain but she eventually grew to like them as they ceased being insane kittens.