Our goal is one egg per layer per day. We do have some heritage breeds who I'm happy with 5 per week if it's consistent but they do have a tendency to go broody. The ducks were completely off the lay and we are now averaging 2 eggs per day from our 3 girls. I think it's about 5 per week per duck.
The colour and structure of the yolk and white is visibly improved too.
We use a custom grain mix from our local feed store that meets the protine and vitamins needed for both the ducks and chickens. But I have heard you can ferment pellet food too. I'll get a breakdown of components for you if you like.
For the process with have 3x 20L buckets with lids that we have on the go. I worked out the amount of feed necessary by trial and error and have been reducing the amount based on what they actually eat with minimum left overs and waste.
I measure out the grain into a bucket, fill with water so the grain is covered and let it sit for 3 days. After 3 days it smells a bit like beer and the grains are hydrated and swollen. Sometimes I add a little apple cider vinegar too but only occasionally and it's not needed for there ferment process. Then I pour it out into their run to encourage them back in from free ranging through the day and reset the now empty bucket so it's ready again in 3 days.