I bought some meat birds, that I have had for 19 days now. In the last two days I have had 3 to die. I am feeding them from 8 am to 8 pm. I feed them broiler feed, but started out on chick starter/grower. They get clean water several times a day. I don't understand what I am doing wrong. I posted in the feeding time section on whether or not to give them grit. If someone could help me figure out what I am doing wrong that would be greatly appreciated.