So I had some silkies hatch in May and the smallest one has since grown suddenly ill. This morning I let them all out and all but her came out, at first I thought she'd been hurt so I checked her legs and body and wings and all seemed fine. I then put her on the ground and instead of hopping off straight away she waited till I put my hand on the ground until she stumbled and slumped to the side before sitting back up again. She didn't move from there so I bought food to her, but she wouldn't eat. I then tried water, again no response. I thought perhaps her feathers on her head were too long (they come over her eyes quite a bit now, she's my fluffiest bird) so I cut them around the eyes a bit which was easy since she just sat there instead of moving. I then tried again with food and water but nothing. She couldn't walk, she was just so hesitant to move and her head is constantly looking down and she often has her eyes closed. She's quite a vocal bird too but she's barley even chirping, what's wrong with her?