I’m thinking about trying to ferment, but I’m nervous. So you just feed them in the morning a certain amount and once it’s gone it’s gone? I have 4, how do I know if they’re getting enough?
If it's your sole source of feed you may have to do more than one feeding a day. Once you get a hang of how much they eat on average on a given day, you should be able put out exactly as much as they'll eat.
My approach is to offer fermented feed first thing in the morning, and then have dry feed available during the rest of the day. That way there's no need to worry about precisely doling out the right amount in the morning.