Hi, guys! I want to order leg bands to put on my chickens so that I can tell them apart (Barred Rocks). My questions are: How the heck to you put them on? I cannot find instructions anywhere! If I want to order a smaller size to put on my chicks, do the plastic ones cut right off so I can replace them with the adult size when they're ready? I'd appreciate any and all information you all might have.. Here are the ones I'll be ordering: http://www.cutlersupply.com/store/item.0311.html Thanks, everyone!