I mix oyster shell in with the feed, I would like to know what everyone else uses or suggests... I don't believe my hens could be getting enough due to the fact I've experience some feather picking.
Animal-based protein is considered most appropriate - particularly if you think that feather pecking is related. There are many causes of feather-pecking. This link should be helpful - https://www.backyardchickens.com/threads/topic-of-the-week-feather-pecking-eating.1148824/
You should never mix the oyster shell in with the feed...offer it in a separate dish on the side. Oyster shell is not protein. Do you also feed them a complete feed? How old are they and what size is your coop? How many?
I have started to grow some higher protein plants to give them as a treat with their pellets. The pellets I feed are 16% protein. Also the pellets/crumble probably have calcium in them so I give mine the oyster shell in a separate container. Lots of things to consider when it comes to feather picking. There's probably a thread devoted to it here on BYC
Dry high protein cat food ......My Birds look fantastic and never pick....I toss out a couple of handfuls twice a week...
