Help! Tiger skin chicken legs are open and hairless. What is the reason?

Listen to the description, it should be splayed. Parent birds may have severe pecking disease. It's been 40 days, so take out the nest as soon as possible and tie it up with a rope to correct it. Now we can only try to get them as close to normal as possible. You can search online or watch budgerigar. It is suggested that the bird should be inspected about 12 days after hatching. At this time, the bird can basically stand. If you can't stand up, you should tie it with a rope as soon as possible. The sooner you correct it, the better. At this time, correction can be completely cured.