Do any of the feed companies make a higher calcium laying pellet/crumble? My older hens need the extra calcium and they won't eat the oyster shell pellets. I wish someone would make a higher calcium laying pellet for older hens. Any ideas about how to get calcium down them. I have about 50 laying hens so please don't say yogurt, cottage cheese, etc. It would take a truck load! Can you buy a calcium powder anywhere that I could mix into the feed or into sometype of mush and give it to them that way?