NathanZee
Songster
Okay. The layer feed doesn't contain enough calcium for ducks? That's great they are okay with it.Some of mine do not eat oyster shells much - I think that's part of the issue. So I use a nice organic layer feed, and add the calcium citrate. I have used calcium gluconate liquid, but the citrate is less expensive. They don't mind it at all, it just mixes into treats or food.