i have a one year old cat and i got a new kitten. they are both neutered and ive been feeding them the same thing every day. my cat isnt very friendly with me, but he will come out of his room if i call him etc. the kitty is very playful and always wants to play with my cat even though hes bigger than her! how do i tell if the cats will get along?is there anything that could cause problems between them?