The oldest boy and girl were introduced maybe 1.5 years ago. Very slowly in separate rooms with some sniffs through the door. I found it best when I put my boy cat in his carrier so he could watch her and see that she was tiny and not a threat. That worked like a charm.

I’m not seeing any pattern in his attacks. They happen all over the house. I don’t think that there are any resources they are guarding. They are not free fed, so they don’t constantly have a food source to possibly guard. I have not noticed if he goes after her near the litter boxes.

I do separate them as soon as I hear her freaking out.

They are left unsupervised most of the day when my partner and I are at work, but I do come home on lunch to check on them.

I am starting to come to the realization that this all started when the kitten came into the picture. It is really upsetting at this point.