I have a two year old Russian BlueTazzie, saved from wood pile at 4 days old. And now a 2nd kitten Lizzie, now 6 months old abandoned in my carport day it was born. Tazzie is a little more anxious I believe being in wood pile 4 days before we could find her in it, very reserved, Lizzie very cuddly outgoing. Sometimes play gets rough, Tazzie the bigger cat more submissive on back, Lizzie standing wrapping legs around Tazzies neck, and was not using litter box well... As soon as plugged in a day both settled down, Lizzie started using litter box consistently. She is always rubbing my face and cuddly. Tazzie was elusive, now coming under blanket and much more receptive to being held and head and ears scratched. Put on auto delivery!!!