I picked up eight pullets in the spring and expected to have a roo or two, or maybe some not make it, well....... That didn't happen. They are all healthy, female and do have the minimum space required but are acting like they are a little crowded. I get a bit of picking recently and just had to separate out another BO due to a bloody head. I think it's time to thin them out to about five or six. They are thirty one weeks right now and are currently on layer pellets. I picked up a bag of 21% finisher. Here's my questions, how long should I feed them out on the finisher? Should I give them some calcium to supplement so that when they lay while finishing them they don't have some nasty shell-less egg problems?