Kitten unsteady on back legs

[viviennewestood]

One of my kittens is very unsteady on her back legs and falls off of things very easily. She's 9 months old but appears to be much younger and smaller than her sister. Any ideas what it could be?

So many possibilities she needs to see a vet to narrow it down.

What does vet say?

Look up hyperplasia - that was my first thought. But I agree with pp that you should take her to vet for a consult.

Yep vets. Make an appointment tomorrow.