Yeah my partridge just started developing longer, shiny orange feathers on the back of the neck. He has also been getting a few "streamer" feathers in his tail. My white one of the same age is still as fluffy as ever. I guess I'd better order or make a rooster collar! It won't hurt to get one anyway, just in case. I'll take pics later on and post them.
Do bright blue earlobes indicate a male? My white one has them but my partridge doesn't. I've seen another partridge that had the blue lobes, but never found out if it grew up to be a roo.
Another unrelated question: would play sand make a good bedding in their pen? Right now I'm using wood chips, but they scatter them all over the place and the chips don't stay fresh for long. I would line the pen with a tarp attached to the "walls" of the pen to keep the sand in. I'd like to be able to scoop out their poop every day, similar to a litter box. I'm planning to switch my coturnix and button quails over to sand for similar reasons, as their eggs are difficult to find in wood shavings and they tend to bury them.