We got a new kitten on Saturday who is 12 weeks old we already have a 1 year old cat , we done everything properly gave kitten sanctuary ect , the cats will eat next to eat other in the sanctuary room , but our older cat will just randomly attack kitten pounce on her for no reason , pinning her down which really scares the kitten , we have let the kitten walk around the house without other cat there then let other cat out he didn't react to her smell badly , he dosnt even hiss at her it's so confusing because when he's not with her he cries at her door , the kitten dose hiss at him however when he bullies her which is kind of expected , I have been uses a spray bottle to break fights up which works temporally