I had an indoor Silkie for 3 months and I just made my own diapers from following the pattern on youtube by chickenmom. Too many people complain about the adjustable purchased diapers so I just saved the money and made 5 of my own - I modified and made some adjustments on my Silkie's diaper because velcro doesn't work well on hair-like feathers of a Silkie - I used a large heavy duty safety pin to hold the two shoulder elastic straps in place. It takes a couple tries to pin it right and at a comfortable position. I made my own diaper pouch insert out of Sandwich Baggies and lined the inside with 1/4 of a paper towel all pinned to the inside of the diaper pouch and threw it all away as a unit when done. It was nothing fancy but it worked and I washed out each diaper every night to air dry overnight and gave the Silkie's tush a baby shampoo and some air dry time while she roosted in her indoor pen. It was troublesome at first but after a week we were pros at putting on and taking off diapers. Our Silkie even layed one of her eggs in the pouch!
Have fun getting those chicken feet to stop pulling the diaper off before you can get it fastened, then have fun watching the chicken walk backwards for the first time! My DH held the two safety-pinned shoulder straps together and gently pulled the Silkie forward for a minute or two to get her little feet working until she realized she could walk forwards while wearing the diaper. Our Leghorn adapted to her custom-made diapers too. The only breed we had that refused to walk in her diaper was our Ameraucana so we gave up after trying for a week.
