Hi, I am new to this backyard chicken thing and I really need some advice. We have 3 Rhode Island Red hens that we got about 6 weeks ago. They were about 4 or 5 months old and hadn't started laying yet. About 4 weeks went by and finally mine started to lay last Sunday April 22. My husband has his own and so does my daughter, that is why I say "mine", lol. I just noticed last week that the 2 that haven't started have really pale and shrunken combs. Mine has a bright and beautiful red comb, but the other two almost have none they've shrunken down so much. They're all eating fine and pooping fine as well. In all my avid research over the last week, I thought it might be mites or worms so I bought some diatomaceous earth and sprinkled some in the coop today. Is there anything else I should be looking for or know about? I'm a worry wart and I'm really afraid the 2non laying hens are sick 
