It usually takes 3-4 days to see sprouts. I feed it after one day since I lacoferment, and feed the least amount then. I slightly increase the amount I feed as it sprouts and progresses in the sprouting. I've noticed that my lactating doe can tolerate more grain the more sprouted it is, and she gives a fair amount of milk, so this really helps her stay in good conditon along with her free-choice pasture and a bit of hay in the barn at night. She seems to respond well to the higher protein of the sprouted grain, too, which she needs to make milk. The growing doeling responds well, too.
Sometimes a batch just won't sprout, so I have to feed it just lactofermented. This can happen if the fields were a bit wet when the grain was harvested and they dried it using hot air. Sometimes it will still sprout but it takes longer and all the grains don't sprout.
This winter I hope to figure out how to get some of the sprouts to the green grass blade stage for my hens and turkeys and a treat for the goats.