They can crop up infrequently out of your show stock too. Same thing with single combs, 4 toers, etc. It doesn't always mean hatchery stock origin. Its just something that breeders cull for right away as chicks. Some of the smaller breeders might only hatch 50 chicks a year out of their birds and might never see it happen. Other people will hatch 500+ chicks a year and your odds of seeing those abnormalities do pop up though.
You see it alot more often with your dilutes...the buffs and splash. The more you breed stuff like the wheaton based buffs together, you will get a higher percentage of clear buff feather coloration, but you get a higher percentage of red skin showing up. Cross in a partridge/black tail based buff to get back to the dark skin again. Same on splash.... splash x splash = 100% splash. Keep breeding those dilutes together long enough and eventually you get these washed out looking splash and see more of the red/pink skin showing up too. Cross in good blues to get back your color again.
Red skin isn't something you want to use for breeding. Can't argue with a freebie just if you want it as a pet though.
