Cats are prone to brain tumors which generally causes some of this behavior. How about taking her to the shelter and explain the problem? Maybe they’ll take her back and she can live out her life there?
She had blood work done last week and it all came back normal.
Vet started her on Zylkene to see if we could take the edge off. It actually seems to have made things worse. I’ve Feliway diffusers running too, also started her on a tryptophan cat treats.
At first I thought she was feral, but even that could be worked through in time. But this behavior of no warning and direct biting isn’t going to work.