I have a similar question about feed for laying ducks. I had a male muscovy duck, but we have since found him a good new home, and now we have our two females: ancona and muscovy. At the time, because I had a drake- I didn't buy layer feed because I knew it wasn't good for him to eat and it was too hard to get them to eat separately. Now my muscovy and ancona (second year for ancona, first year for muscovy) started laying a week ago. Last year, my ancona ate regular non-layer feed and supplemented with oyster shells regularly. Since I still have a bunch of the non-layer feed, I want to continue to do this, as long as it's sufficient to support egg production. So far since they started laying I haven't seen them eat from the oyster shell (they still could be but I haven't been seeing them eat from there or any oyster shells in their poo). My questions is 1. just want to confirm I can continue to have just oyster shell as supplement for egg production (I've read mixed opinions on this before and so I want to be sure) and 2. I would assume muscovies eat oyster shell like other breeds but this is my first time with a muscovy and I want to be sure she'll eat the oyster shell if she needs it. Thanks for the input!!!
I feed mine a regular flock raiser feed with oyster shell free choice. They have been doing just fine on that. You can keep doing what you are doing. If in the future you see issues with their shells you can make a change.