My older cat is not accepting the new male kitty. Anything I can do to help this along...
How long have you had the kitty? It might just need time to warm up to him or her.
I hope the older cat is female as a male may spray against the kitten even if it's neutered cats that eat together are friends place their food bowls either side of a closed door so they can hear each other eating put a toy either end of a piece of string close that door on the string so they can play with each other unknowingly