Can't stand, can't walk, but looks healthy?

[centrarchid]

Thanks for reply. I am considering mareks. what does not match is other symptoms W/ mareks do they thrive in all other ways? thats what is trippin me up. Eating well, pooping, alert...

My Mareks birds eat well and are alert. They can not get out of their own poop or fly which they could otherwise do very well.