Watch them closely to see if they are actually eating it or not. My ducks will put anything in their mouth/bill, but the majority of it comes back out again. They do a fair amount of probing with their beaks and it's possible they. may be finding bugs or something you're not seeing. They could also just be nesting.
With ducklings, the size of the shavings should prevent them from actually getting anything down. Be wary of smaller, bite sized flakes, or any dust at all.
With ducklings, the size of the shavings should prevent them from actually getting anything down. Be wary of smaller, bite sized flakes, or any dust at all.
