I sprout Barly when I can get it whole wheat and a little corn in the winter. Sprouts are about 50% of there diet year round I dont have much you could call pasture here, I stopped taking fodder all the way to grass they just picked at it and wasted about 50%. I add all there Niacin and vitamins to the spouts 12 hours before feeding it in the morning. They have duck pellets available to them 24/7. But morning is sprout time and there favorite time of day.
That being said the system I set up takes me 5 min 2 times a day. and a shower I dont use. you only have a couple geese you could do it on a smaller scale. Day 4 for sprouting is the perfect time to feed fresh. The grains have turned starch into natural sugar.
My system is really easy I have 4 (2 1/2) gallon buckets with drilled holes in the bottom and one soaking bucket. Left is the grain in for its 12 pluss hour soak just water and a little bleach, Above it is day 2, going right is day 3, Front right is tomorrows breakfast it has flax seed and Breweres yeast mixed in it today, when there molting I add fish oil. For my older geese I will add some shelled sunflower and safflower seeds.