My Cat "Loki" attack me a few years ago. He actually drew blood. He was always attacking my other cats and I finally put him to sleep. It took a few years for my cats Hermonie and Renesmae to recover. They are fine. I would consult your veterinarian too. It was very hard to put "Loki' to sleep...
My cat Neville is over 11 years old. He came from a shelter where he was a stray. I do not know how old he is but he is starting to lose his teeth. Has anyone ever dealt with this?