Cats arch their backs when they are afraid, when they play and when they just need a good stretch. ... Cats also may arch their backs when playing. You can differentiate this more playful cat from the fear aggressor by the fact that he won't be growling, hissing, spitting or showing his teeth.

Why do cats hunch their backs when you pet them?

Contentment. While petting your cat's back, you may have also noticed that his or her back will arch affectionately. This is because cats mostly use body language to communicate. An arched back, a purr, and slowly closing eyes usually indicate that you've found a spot where you cat enjoys being petted.

Why do cats hunch their back and walk sideways?

Cats typically walk sideways because they are exhibiting fear or they are being threatened. It could also be a sign of defensiveness, intimidation, or a health condition such as vestibular disease. It may also just be part of a cat's or kitten's favorite postures during playtime.