I have about 20 chicks ages 3 weeks to 6 weeks all in a 8 x10 shed with a heat lamp. They have plenty wood shavings and their water and food is changed every day. All of them look and act healthy. This weekend I found pinkish poop and didn't think much of it. Then I found some more today. Please tell me this is normal. They are on medicated chick feed and I've hatched out all of them except 4 of them that I received 2 weeks ago from a very reputable breeder. Any help would be wonderful as I'm starting to worry.