To my knowledge, Townline Hatchery in Zeeland, MI is the only licensed hatchery in the U.S. that sells the real ISA brown from Hubbard. I sent an email to the company about a year ago and got a call back from the home office in France. The man (heavy French accent) said that Townline is their supplier in the U.S. There may be others by now, but at that time Townline was the only licensed supplier. Several hatcheries have other, similar super layers like sex-links, golden comets, etc. I have tried several other layers, but none have compared to the ISA brown. These chickens lay like crazy, eat very little, and they seem to be affected very little by weather conditions. They do seem to get respiratory problems more readily than other breeds I have had in the past. They grow fast and lay great big brown eggs.