budgie foot

Hi, just after a bit of advice. We have two young Budgies both with the same issue. They have been on the floor since leaving the nest box and struggle to perch. It seems they are only able to grip with/move one foot hence why they’re struggling. We took them to our local avian vet on Monday...

I was feeding the budgies and I just saw what looks like blood on Blinky’s foot?? How could that have happened?? Sorry it isn’t good but this is the best picture I could get :unsure1: