My first cat is 4.5 years old. We got him in lock down and he has always been incredibly attached to me, not so much the DC but still a lovely cat.
We got a new kitten 8 months ago. Did everything recommended ie keeping them separated, swapping smells, feeding on either side of door, joint treat time etc.
It's been 8 months and things are awful. The kitten is very interested in the cat but the cat not only hates the kitten but now us. He is aggressive to the children and me, growls, charges, scratches etc. He has started spending most of him time outside and only comes in to eat. Sometimes I can't even get him in overnight. If I try to keep him in the house he gets louder and louder and more aggressive. My children are absolutely terrified of him now.
He's been looked over by a vet, and no health issues apparent.
Is there a way out of this? I could cry most days as it's just unbearable and feels unfair on everyone at this point.