@KayTdid My English chocolate cuckoo Orp's name is Hershey, and his breeder has a roo named Hershey, too. Great minds think alike! My solid chocolate female's name is Cocoa. She is a doll and makes the most lovely cooing sounds.
My English black female FINALLY came back into lay, so I will have sex-linked offspring from her and Hershey--all the chocolate/chocolate cuckoos will be female chicks, and all the black/black cuckoos will be male chicks split to chocolate. Then next I'll breed him to my blue girl(s) and make mauve. Can't wait!
BTW, Jubilees can be shown in showmanship class in 4H (not in regular conformation classes, though, since it is not an APA approved color). But you're right, you wouldn't want to show a bird with obvious "defects" even in showmanship, but they needn't be perfect otherwise. That class is about how the kid grooms, handles, and talks about the bird, I'm pretty sure.
@flocktastic I use a water-soluble mix of vitamins for poultry (I think...it may have been for multiple species but with different directions) that I purchased very inexpensively at Tractor Supply. Any place like that or Rural King, what have you, in your area will carry something like that. Water soluble vitamins are very safe, but should be given as directed. Excess goes into their poo. The fat-soluble vitamins are ADEK. They are important, too, but I just count on their feed for those. I also feed fruit and veggies. The chickens get most of our garden every year now, plus we buy some fruit for them during the winter (like bananas, which are always popular). Oh, and we don't use the cheapest feed for the breeders, either. The regular layer flock gets half Dumor (which is the cheapest around here) and half Nutrena, while the breeders get 100% Nutrena. If you sign up on Nutrena's website, you'll get a coupon with their little e-newsletter every month or so. $2 off makes it more competitive with the Dumor, though still more expensive. We did an experiment last year and shell quality was definitely better with Nutrena than with straight Dumor. Half and half seems to work well for our mixed layer flock that we keep for selling eggs for consumption. That flock includes some hatchery buff Orps and Australorps that we started with, as well as a few purebreds that are either "one-offs" like our Light Brahma and Ameracauna, and Orps not being used currently for breeding.