I'm wondering if chickens are colorblind. What brings this to mind is an interesting thing that is occurring in my flock. I used milk crates as laying baskets, half full of pinestraw. I have 12 of these crates mounted on the back wall of my coop. All but one of the crates are black. The one that is red is the hot spot. The majority of my eggs come from that red crate. I'm thinking of moving it around to see if it is the location, or the color. What are your thoughts? Weird huh?