One of my 7 month old Buff Orps has a vent that looks as though it's open. Nothing is protruding...yet. After some research, I found that not enough calcium can be a factor in prolapse. We had been watering the chickens from an outside faucet all summer and fall (hard water) but recently started getting water from an inside faucet (soft water). We feed Blue Seal Egg Maker crumbles and offer free choice oyster shell, but I'm wondering if this young flock, laying almost an egg per hen per day, needs an additional calcium supplement. I got the only calcium supplement that Tractor Supply had, and TSC is the only place open now. It is Goats Prefer brand Calcium Drench. It has about 4 grams of calcium (calcium chloride) per ounce. I haven't been able to find a dose in grams for calcium supplementation, just so many ml of specific products. Anyone know how much of this I might give immediately and what kind of product would be good for a maintenance supplement? In case Ginger's next egg causes a full blown prolapse, I'm ready with the warm bath, honey, Preparation H and cozy dog kennel. Any other recommendations?