My mother told me that letting chickens eat watermelons would cause them to get black spots on their comb. At first I didnt believe her because I knew chickens loved watermelon when I gave it to them. In the summers most of the time my papy groes wm's and this past summer we threw a lot of them to the chickens. As the chickens ate them sure enough my chickens began to get black spots on their comb. when we took the wm's away....the black spots went away. I'm not sure but personally I believe it has something to do with the rind. What is the deal? Is this dangerous? I hear a lot of you say you feed your chickens wm....do you have the same problem?