So how then do you give it too them? I have liquid calcium/mag in strawberry flavor and i mix it in with yogurt for my chickens never tried to give it to my ducks or geese.I think the liquid would be better, but I don't have any, so I just use mine, which is 500mg calcium and 1000 I.U. D. I don't have any proof that it works, just a few hens and turkeys that were in distress, got the pills and lube, and within 24 hours, passed their eggs. The smallest ones I have done this to are Old English that weigh 500 grams, the turkeys weigh about 14kg.