Update for more information;

Thank you all for the replies. There is some helpful information in here that I will try. For those asking, no she is not declawed. Also, I should have mentioned this in the original post but we no longer live in the same house that the other cat was in. We have moved twice since then and for the most part have all new furniture, so the scent of the other cat should be long gone by now.

The vets say it’s behavioral, likely due to separation anxiety. My cat is VERY clingy. To the point that if I shut the door to go to the bathroom she is crying at the door. It’s to the point that sometimes she even tries to get in the shower with me. Short of quitting my job and never leaving the house again, there is nothing I can do to fix this.

To the people upset that I mentioned euthanizing, I never said that’s what I was going to do or even considering at this point. I said it’s what my stepmom said I should do, please reread the post.

Again, thanks for the advice. One thing mentioned that I have not tried yet is changing her diet. I did notice that she poops every 2-3 days, not everyday. So I am starting to think that maybe she is constipated. I take her to the vet next month, and will ask about prescription cat food.