More good info. Searched the internet, made some phone calls. No one around here has Dry Stall, just Stall Dry which is a whole 'nother thing. Had to go to the local Walmart so I stopped at TSC store along the way. They are not known for low prices, IMO. Got a 5lb. bag of poultry gravel (granite.) A feed store 30 miles from here has a 50 lb. bag for the same price. Something new to try out. Gene