I have a mature hen and a young rooster that free range with a large fowl flock during the day. They are dark colored, and there is plenty of ground cover. I've had no problems either with the other chickens or with predators during the day. Worst thing was nasty critters reaching in through the wire holes and grabbing wings or whatever the could and pulling them off. (this happened partly due to the silkies preferring to pile against the pen side on the ground instead of perching. The two birds I mentioned earlier somehow manage to reach the higher perches just as well as the other birds - how they do this - I have no idea. Silkie magic or something.
If you come to the auction, I can give you (maybe) a couple of fertile eggs. I have one silkie laying. She is lavender (self blue) and the rooster is a nice porcelain (or self blue cream). Today's egg was the last one into the incubator. But if we get one Friday and Saturday - you can have those. Her eggs are fertile. I know that two is a really small number, but if you want them, they are yours.