I went outside to discover the hens EATING the foam covers you put over your spigots(outside faucets) in the winter. 2 of the coverings were completely eaten and one only partically. What will this do to them , if anything? They are fed well(kids see to that) and I have no idea what they thought they were eating because you know foam can't possibly taste good. are they lacking something in their diet? They are not laying yet, probably not until February.