I got a couple of chicks from Cackle Hatchery three weeks ago and noticed something strange today. All of the sumatra chicks I have (five) have part of their beak missing. It couldn't be because of the quality of the diet because all other 11 chicks are doing very well with the medicated chick food. Here is a picture of one of them below. All of the others are like this but this one definetly has the worst. What do you think it might be?