The Muirfield Hatchery in Scotland is the only supplier of genuine Black Rock hybrids, and they've recently added a Black List to their website, detailing dealers which are selling pullets allegedly Black Rocks but actually other similar sex-linked crossbreds.
See http://www.theblackrockhatchery.co.uk/
They have spent a lifetime developing this particular breed, and quite rightly feel that others shouldn't sell their similar birds under their registered brand name. So if you know of anyone selling 'Black Rocks' and their name isn't on their website list of suppliers contracted to the Muirfield Hatchery, please get in touch with them.
See http://www.theblackrockhatchery.co.uk/
They have spent a lifetime developing this particular breed, and quite rightly feel that others shouldn't sell their similar birds under their registered brand name. So if you know of anyone selling 'Black Rocks' and their name isn't on their website list of suppliers contracted to the Muirfield Hatchery, please get in touch with them.