I’ve had issues with aggression in one of my cats in the past. Half tortie, half siamese, all attitude. What worked well for me was L tryptophan (the amino acid that’s in turkey that causes the post-Thanksgiving food coma). A small dose of that daily kept her more mellow. Many pet stores carry it.
CC
We are doing the tryptophan now along with Zylkene.
I may need to bump it up for a while on another medication.
Guess it is time to talk to the vet.