I have three kids that are 4-5 months old. Two Nubian/LaManchas and an ND. Since about a week ago, they started leaving grain in their bowl, and now they aren't even touching it! I have them out on a pasture with lots of weeds, trees, etc. I wormed them recently, and they just finished a five day round of cocci treatment. They don't appear to be losing weight, but I'm worried they won't grow properly without grain. Are they refusing grain because they like the pasture fare better? Will they be alright without grain?? Thanks!