My 14 Jumbo Cornish X Rocks are 16 days old. I went into the brooder room today and noticed their crops are EXTREMELY large. They get feed 12 hours on, 12 hours off. The feed is 20% protein and said you could feed it from day 1 of the chick's life. I was suspicious when I opened the bag and noticed cracked corn and alfalfa pellets in there. I spoke to my feed man and he said they will be fine and won't need grit until they are about 10 days old. So I ordered baby grit from him and when I went to pick it up a week later, he "forgot" to order it. I asked him what I could do in the mean time and he said I could give them sand and they will be fine. Nope- not the case. Their crops are HUGE and I don't know what to do about it. My baby grit is supposed to be in tomorrow. I put #2 grit in there with them but they won't even touch it. I took away their food and gave them fresh clean water. What should I do?! I don't want them to die