Sorry, I know you are worried. But the thought of a chicken slide made me giggle.I will have to do something - those silkies are just not built for roosting up high. I thought putting the steps in would help... but all it does is help them get UP! they just launch themselves off the roost in the morning! Maybe a slide?
I had to yell for mum to go grab Curly this morning she was just going to launch herself into space! brat of a bird!
Have you thought of a tree stump or a stool to provide a landing spot that is less of a drop for them?