This seems to be less of an issue with calcium powder and seems to resolve itself within a few weeks, but again check with a dentist. (wellnessmama.com)
Mix 1/2 cup of calcium powder with water to get desired texture. (wellnessmama.com)
(and don't throw away their shells, see my post about making calcium powder from egg shells, to stretch their value even farther). (blog.paytonspaleo.com)