I recently bought three new Zebra Finches and as the girl was taking them out of this PATHETIC breeding cage she kept them in (There were about ten in the ONE cage)they were all fine in the cage at the shop and two of them were fine when i took them out at home but one of them, a big female can't seem to grip at all with her right leg, she just bends the leg up and sits on the leg and her claws together while her left leg grips the perch as usual.
Is there anything wrong with her? I'm worried!
[edit]
What can i feed them to give them the best health?
I give them a mixed finch seed from my local pet store and it looks rather good.
It's just other things like veggies and greens i need to know.
CAN SOMEONE PLEASE HELP! I NEED TO KNOW IF SHE NEEDS VETERINARY ATTENTION OR NOT!

does the finch ever use the other leg? they do sit on one leg at time but to ne honest - if in doubt take the bird to the vet, there is no way for anyone to tell over the internet.