Grandma The Chicken
Chickens Are Too Fast
I'll try to get close-up photos but here's the behavior.I'm sorry to hear that Parmesan is having leg trouble, it can be distressing to see your chicken in discomfort. It's difficult to diagnose exactly what might be causing Parmesan's leg issues without performing a physical examination or seeing some pictures or videos. However, here are some potential causes for sudden leg weakness or hop, that you can explore and determine if they might fit:
1. Sudden movement injury
2. Egg binding
3. Dehydration
4. Arthritis
5. Marek's disease
If you think any of these might be a possibility, it would be best to consult with a veterinarian who has experience with chickens. They can help diagnose the issue and provide appropriate treatment.