I live on the Big Island of Hawaii and just started off with chickens a-new. I purchased these 5 - 1 1/2 week old chicks now from a lady who in-turn purchased them from a hatchery in Iowa.. they mailed them to her. She only had knowledge on the Rhode Island Red.. All the others she could not figure out. She told me the two large yellows were Jersey Giants and well with much research they are not. I do however have one. The dark/white winged chic is the Jersey Giant and the one with stripes is a Dark Cornish. The list she gave me is below; "The assortment we have includes : Black Australorps; Lt. Brahmas; Dark Cornish; Black and White Giants; Buff and White Orpingtons; New Hampshire, Rhode Island Reds, Barred, White, Partridge, Buff Rocks;Delaware, Sussex, Turkens; White, Silver Laced, & Columbian Wyandottes, Red Star and Black Star." So the two yellows I have either figured to be Delawares of Orphingtons however there wings are coming out white and not red or buff.. so Delawares? They are very thick heavy and hardy chics. Any help would be appreciated. I can also provide more pictures need be.