Hi everyone , I was wondering if you could help my parents with their cat.

She is about 3-4 years old, they've had her since she was a kitten. She's an indoor cat, they live on the third floor of an apartment so she goes on the balcony once in a while. They take good care of her, feed her well, spoil her, etc. The only problem is that sometimes she bites them. They don't instigate her or pester her, or provoke her in any way.

Example: My Mom was sitting there watching TV one night and all of a sudden the cats ears go back and she bites my Moms finger, drawing blood. Samething happened a few mornings ago, my Dad was laying in bed then she attacked him, drawing blood again. She bites pretty hard too, it looks like when a snake bites, two deep cuts.

This happens once in a while and we aren't sure why. Anyone have any ideas, please?

Thanks.