I think my chicken is about 3 years old. Recently she's been limping. I actually didn't realise how bad it was as my husband usually looks after them. I posted a video showing how bad she is which is here I've heard that chickens can have strokes. Could it be that? We've checked her feet to see if we can see anything but it looks completely fine. Please excuse how scraggy she looks, we actually just gave her a warm bath as we heard this can help so she was still a bit wet in this video. I've now put a couple of bandages around her feet to see if that helps her. At the end of the video, it's like one of her legs has completely buckled underneath her. She's still eating, drinking and I'm pretty sure she is still laying eggs.