Well its your chickens, do what you will- you don't have to listen to anyone here.
When i kept chickens though i never once had a single problem with the chickens damaging themselves flying up or down from their roosts.
And do you have experience of cochins or other very heavy breeds?
Chickens instinctively don't like to sleep on the ground at night due to predators like foxes and stoats- in the wild, you are extremely unlikely to find any chickens sitting out at night on the ground. In the wild, a chicken on the ground at night is a dead one.
Oh I agree, but since we are not talking about wild chickens but the largest ornamental breed kept,things are a little different.
So i am sure they prefer having the option to roost than no roost option at all (its a bit like providing caves for common pleco's- in the wild they spend a lot of them time under cover, so feel less stressed in captivity when given the option to take cover).
But domestic fowl are very far removed from their wild cousins and the large ornamentals especially so.
You'll always find the people who have bad chicken casualties due to foxes are the owners who keep their chickens on the ground.
No actually you find people who have fox casualties are the ones who do not have secure housing and runs or electrified netting as I do. In 30 years poultry keeping I have never had any of my birds taken by foxes or other predators.
Chickens will also instinctly not go out in bad weather if they have any choice as well.
With all due respect, you seem to know nothing about chickens at all. All of my birds (some 200) will happily go outside in bad weather. The only thing they dislike is strong wind.
When i kept chickens they put themselves in at night when the sun started to go down, and flew up onto their roosts in the chicken shed to sleep on at night- early in the morning, they'd fly down and let themselves out (we specially designed out chicken pen to be fox-proof but also allowed the chickens to enter or leave it at any time.
I would be very interested to hear about this design and we will both become millionaires within the month. BTW birds are as likely to get struck by a fox at dawn as after dark. Foxes aren't daft and will wait underneath roosting places for pheasants to come don to the ground at first light.
At one point we had 160 bantams of various different breeds and cross-breeds and never had any problems with this regime even in such great numbers, so i know these things from experience.
Though i suppose if you force a chicken to stay on the groun its entire life, its not going to learn how to roost properly and nor will it build up the muscles in its wings to fly, and if you breed them like that over generations, then they probably will lose a certain amount of their natural ability to do these things well. I'm not a big fan of the fluffy or overly feathered breeds of bantams since they often suffer a lot of issues in their day to day lives that other chicken breeds would not due to the way they have been bred.
Since you appear to know more than I do, please explain what these issues that they suffer with.
I can assure you that I am learning about fish and don't know much, but am actually quite respected within the poultry world, for my knowledge. If as you suggest, my birds were not fit becausae the larger ones are not allowed to roost, they would drop dead from heart failure and would not be placed so highly at shows. I didn't win 'Best soft feathered light fowl bantam' with a poor quality bird. I don't have a window full of first prize cards won by birds in poor physical condition.
I respect your opinion, but please do not try to teach me to suck eggs (pardon the metaphor).
30 years in fowl should have given me some experience I think.