Supply grit and potentially oyster shell

Solution

Offer appropriately sized grit free-choice. Provide oyster shell separately to laying geese.

Explanation

Grit is needed for grinding food in the gizzard. Laying geese require extra calcium for strong eggshells, which oyster shell provides. Offer these in separate containers, not mixed into feed.

Notes

Geese foraging on varied terrain might pick up enough natural grit.