There is often an adjustment time for one cat to get used to another new (kitty). Snow Tiger took about 7 days to become familiarized with the crew. And I had two queens (Bright Eyes, and Mackerella) who took to washing him right away, Yet, I think it is much easier for a new kitty to be accepted among a multiple cat household (such as mine) , than only for one or two residents, at least this has been my experience with them.

..........wayne