One day before we fenced them up, the chickens decided to come eat the chick food when possible. The chickens always end up pecking at the chicks if they get them in reach. We don't have any roosters. 3 Chickens, 5 chicks. We got ducklings but The chickens haven't gotten near them. Can't remember the exact age but we suspect them to be 8-10 weeks old. The chickens over a year old. Anyone know why this is happening or anyway to stop it?