Yah, Guineas are built differently, you can't really tell if what you are looking at is what you are supposed to be looking at, lol.
JHorn, I'd have to say you have a special "gift" that's not at all common (wish I had it). You are the first person I've ever seen make the claims you've made...
I've been asked this several times, but don't know if it pertains to keets or not
Keets don't even have feather quills at a day old, lol
I'll have to look really close at my next hatch!