it was water w 15..gave him 2 parts 15 and 1 part water..so calc wud be 10% but he gets a slury w his food almost every single time he eats. so when i feed him 2, 3, 5...they are usually approx 1/8 water mix w his food.Looks like he wants the dose held! 15 mix is a mix of LC and 15%?