Hi. I used chicken diapers for about 1 month when I had an older hen that was injured and had to be inside the house due to bad winter weather. It was OK, but I probably would not recommend it. I had to really be careful that the diaper was fresh/clean and needed to change the diaper often or else my hen's butt feathers would get really dirty and smelly. I was also paranoid about the diaper coming off and her pooping somewhere in the house without me knowing and then finding a surprise later on.
I know others have used diapers with no issues, but for me, I wouldn't recommend using them.