I can imagine it would be tough with a bigger one! Especially with feathered legs! My bantam girl is easy to get in and out and making her hammock with some scrap fabric was simple. You must have loved that rooster a lot.
Here's Angel's journey so far for anyone who is interested.
Day 1: The first of this month Angel started limping a little. Seemed like maybe she was drunk or had hurt a foot.
Day 2: Fell off the roost 2-3 times at night (I have a baby monitor in coop so I heard it), before she finally gave up and went to bed on the hay.
Day 3:  I started the entire flock on vitamins in their water to rule out deficiencies.
Day 5: One leg was curling under as she walked and other couldn't hold her weight on her other leg in order to hop. She could still occasionally stand, albeit wobbly, on both legs, but would easily fall over. Starting to look less like injury and more like Marek's.
Day 7: She spent most of her time hiding behind things in the coop. When outside, she sat on her haunches a lot. Knees bent while she grazed.
Day 11: Both legs were now curling as she tried to walk and she tripped a lot.  She'd use her wings to balance and when I set her on a smooth surface she kept falling into the splits position...one leg in front and one in back.
Day 12: I made her a hammock since she could no longer walk to get food and avoid sitting in her own poo. She really likes the hammock (see video on my other post) as it gives her balance, comfort, safety, and easy access to food and water. She's separate from the others, living in a cage inside now.
Day 13: I've started her on colloidal silver. I mix 2 drops infant vitamins, 1/8 tsp b12, and 1/8 tsp colloidal silver with 2 tablespoons of water then pour it into a handful of showbird crumble to make  a special "mush" for her. She loves it and gobbles it up! With nothing else to do all day she eats and drinks a lot. This is good as I can see she's pooping regularly and is getting nutrition. Hoping to see an improvement soon. I am taking her out for "physical therapy" daily and give her lots of cuddles and mealworms treats.