hmm, I would be cautious with PT wood anyway. The reason I asked, and it would be doubly beneficial now, was to suggest you wrap(tightly) some old bicycle tire inner tubes around the roost. Here is one study about it. There is another but I don't agree with how they presented their findings so if I link to it I'll spend the next two hours picking it apart.....so I'll just leave this one for now.......
http://www.yourchickens.co.uk/care-and-advice/the_perfect_perch_1_2842822
Edited to add I was able to get old tubes from a bicycle shop for free..
http://www.yourchickens.co.uk/care-and-advice/the_perfect_perch_1_2842822
Edited to add I was able to get old tubes from a bicycle shop for free..
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