I think you can show columbian in the AOV catagory. Silver partrige is also termed gray and gray is a standard color. Silver partridge have pencilling and grays don't but I believe a silver partridge can be shown as gray. Hopefully someone who really knows all this will chime in.Thank you so much for those links to Birds and Eggs!!! OH MY-- she has a color called Silver Partridge that is AMAZING!!! I want those!!! LOL Is that an "official silkie color"? Anyone know? I'll have to put the Columbian on a long wish list since I can't show them and the whole point is for my kids to have fun with 4-H. Her birds are stunning!