so after running to the shed to read the label on my duck food (I pictured my sweet drake thrashing on the ground in kidney failure) I know a bit dramatic but… I found out I am not feeding my ducks layer food at all. I am feeding them duck grower/finisher. Greatly relieved with that but have still decided I am going to switch the chickens and ducks to one food and ferment. We have a small mill just down the road from us and want to keep using them ( shop locally). They offer a chicken grower with 18% protein which is comparable to the duck food and the chicken layer we are using now. They all get offered oyster shell and grit so can anyone see any reason not to use this? After doing some reading about layer food I am too worried about the high calcium and effects on their kidneys.