I currently have a few spare yearling hens that I plan to race, my problem is, they are housed in the young bird loft, and I intend to darken my youngsters, what affect will the darkness have on these yearling hens? my other option is to keep them in the aviary over night while the loft is darkenedhttp://forum.pigeonbasics.org/public/style_emoticons/default/emoticon-0138-thinking.gif what do you think folks?