yea cmon they are a amazing hybrid , they set the standard that others are judged by I have done extensive reading on them and have visited ISA battery barns here in costa rica ISA does offer pullets for sale here with a 500 chick min the ISA was the primary reason for me to attemp my own sex link layer here but I can not get close to the numbers of the ISA my past two breedings have produced a great lil sex link layer and I have made a improvement as the few of my new girls have started to put down eggs at 15 weeks where my first brood at 18 still respectible for a novice breeder as I am but I am bringing in some new stock to add this month to my Hampshire flock to bolster size and egg production so only time will tell if I get it right but I am having allot of fun with it,,, I also want to add the fact that I have hatched my first two crosses without mechanical incubators and have been reliant on my Silkie hens for hatching and brooding kinda old school but fun none the less I will be bringing back a hova 1588 this next tripYou are correct, but for the families that want backyard flocks, Townline is the only hatchery I know of licensed for producing ISA Browns and that many other hatcheries get their chicks from Townline. You are also correct that the ISA Brown is the largest producer of commercial brown eggs. They are certainly laying machines. Even my 4 and 5 year old's rarely skip a day. I put some of the older birds in a separate pen to see how they were laying and I was pleasantly surprised of how well they were still laying.