Hi all----I wrote before about this, and a month has gone by. I took a couple of pictures to show you which I hope will ring a bell in someone's memory. I think this is a genetic mutation. The father of all the chicks is a mix of breeds with feathered legs, and the hens are all genetically quite different from each other. This is freaky! They are healthy, about 6 weeks old, and these hard growths are growing right along with the chicks. They look like keratin (fingernail material). Of course I am afraid to get the scissors out to check, wouldn't want to cause bleeding, but I don't know if these are destined to die anyway. Please check out the pics and tell me if you have seen anything similar. Two broods from this particular rooster, and both have these.