I have a strange query. I don't think it's anything to worry about but:-
One of our chickens has always, for years, pecked and eaten, I think, wood. She has pecked, almost right through, one fence planc. Now she has started on a perch in the run. I think the other one is joining in. Does anyone have any ideas as to why? Have you come across this before? Like I mentioned, she's been doing this for years with no adverse effects but it would be good to know why.