Of our older (5yo) cat. We did introduction's slowly over weeks and weeks. Older cat hissed at kitten though went out of his way not to be physical. Kitten is now I think scared of older cat and will go straight for his chest/throat the second they're in a room together. Older cat literally just wants kitten to leave him alone, he's not aggressive but understandably hates being ambushed. Kitten has been neutered, separate resources, calming treats. How can we improve this situation? They're currently having to time share the house 