I would use the same dry weight of what you would feed. That is if you feed 1/4 lb of grain/ hen /day then add 1/4 lb per hen into the fodder mix.
You do not gain something for nothing with Fodder. Some think they magically turn 1lb of grain into 8 lb of feed but fodder is mostly water by weight. Its the same amount of feed. Or less protein and some extra carb, cellulose and fiber. It may have shifted to more of some nutrients as it lowers in protein.
I often start new grain every other day and grow twice what I need to feed each day;
that way I am doing less work and use each finished tray or tub of fodder over 2 days instead of one.
Then by the time the 2nd day of fodder tray 1 is used up fodder tray 2 is full grown ready to go for the next two days.
So 3-4 trays instead of six for a 6 day growing time.
No need for light maybe the last day in a window.
Make sure you keep the seed bed thick so that there are a lot of un-sprouted grains for them to eat and get the protein they need.
I fodder in the house or garage in the winter and yes it smells a little. Wife hates it. But it seldom freezes here but still too cold 9 months of the year to grow outside and its been burning up and slow cooking my peas this summer. So had to go back inside because now it is too hot to sprout and grow to fodder out in the sun.
65-70 degrees is what you need for fodder to do well.
you can mow it to keep it even or be sure to water evenly, not disturb the seed bed once it is sprouting, and then it may be some seed spouts late or you did not soak them long enough and use de-chlorinated water by setting it out overnight before using.
But I am happier doing the messier Fermenting of grain for nutrition and health of hens, which actually starts digesting the protein and adds enzymes and probiotics to the feed and makes their digesting work easier. More assimilation of nutrients and less feed needed.
Got lots of Kahm yeast growing on top and the hens and goats love it too. I do big tubs and they get some air this is why and I do not want to put poisonous free radical H202 into the water any more than chlorine. I use purified water. H2O2 kills enzymes and is a free radical so you lose lots of anti-oxidants. If you are going to sterilize it and kill everything off why bother to ferment at all???
That is like making your own live culture yogurt or Kombucha then pasteurizing it and killing the probiotics??
my problem without h202 is mold. Really bad.
Some green some black. It seems just as they start to sprout .
I have plastic and aluminum pans.
I've put lots of holes in the bottom too. They are in the house at 70 degrees.
Now I have barley and wheat: is barley more susceptible to mold?
I have read that
May have to forgo that if it's the case.