I don't know what to do any more......

They say biting is a natural instinct to a cat, but you should tell them off for it, even if it is a chair. I read that distracting them with toys is good, but it has not worked for your cat. I wrote this for you out of my cat book. Sometimes cats exhibit bad behavior such as scratching and biting when they are ill or have an injury. They also do this when they feel anxiety or fear. Cat owners need to pay close attention to the health of their cats. They also need to examine their cat's environment to assess if there's something about their surroundings that is causing their cat's bad behavior. Train your cat When training a cat, owners should reward their pets for their good behavior and obedience! This encourages the cat to maintain a good attitude. You can do this by giving them treats, or showering them with affection. It might not be of much use to you this information but I thought I would tell you what I read. Take care and good luck.

cats, like children, lose their baby teeth, she could just be trying to ease her teething by biting, tho it could become a habit. At 7 months, she's at the right age to be changing out to her adult teeth

There are some sprays that you can spray on the items that you don't want your cat to bite, it'll slowly train them not to bite those items.

Hey...try this. I work in a pet store and we sell two very great products to discourage chewing in cats. One is called "Bitter Apple" and the other is called "Bitter Yuck!". Both work really great. My dog did the same thing with a chair that we have. We put that stuff up there every chance we got (just in case he snuck in under the radar) and a few days later he was avoiding the chair all together. They use this naturally bitter tasting product in both that is a deterrent. Dogs and cats (and humans for that matter) hate the taste of this stuff. It's all natural so it won't hurt your cat, either. Trust me this stuff works! Just don't get it in your mouth because it is DISGUSTING! Best of luck...

There are sprays that you can get that will not hurt the cat or harm the furnitue, but tasts really bad to the cat. This should help with the problem. If for some reason it doesn't work ask your vet. for some advise.