I've not had a lasting interest in Production Reds as I have found through my own experience that the Sex Links will outperform them, however I have had Production Reds in the past and I agree that they usually look quite a bit different from APA quality Rhode Island Reds and New Hampshires (example: a lack of black feathers in the tails). However they do appear similar to many of the hatchery grade RIRs and NHRs, and it may be that the hatcheries are actually crossing these hatchery grade breeds to produce their Production Reds. Also, occasionally, you can get a few white feathers appearing in these Production Reds, but those and other oddities would be consistent with the claims of infusing some White Leghorn blood into the Production Reds. I think perhaps the problem in defining a Production Red is that, since they are hybrids and therefore not recognized by any official poultry association such as the APA, there is no standard by which to define them. Therefore any current definition for a Production Red has pretty much been established by the hatcheries that breed them. Given this, the most accurate definition for a Production Red would probably be: A hybrid produced by crossing two red gene parents, with the occasional infusion of a little White Leghorn blood.