As Gail said... just a pinch! Just make sure the feeders are "lightly" dusted.
In case you don't know how often to give supplements...
Young beardies... calcium 5 x a week(only dusting ONE feeding per day).. multivitamin 2 x a week(only dusting ONE feeding per day)
Adult beardies... calcium 3 x a week and a multivitamin 1 x a week
I just set Swordtail's timer for his bath and paused it so I could actually fill his soaking bowl up and he crawled over my phone and canceled the timer
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!