
I went to my local chicken purveyor with the intent of buying four Rhode Island Red chicks to add to my flock. They had a grand total of one Rhode Island Red chick. Therefore, I went with a descendant of theirs, the hybrid ISA Brown. Et Mon Dieu, the chicken turned out to have been developed in la belle France.
Technically, all chickens are hybrids anyway, though many breeds have been established for many years, and one generation looks much like the previous one. Apparently that is not true with these birds, though that could easily be just Monsanto like agit-prop disseminated by the company that owns the patent on this bird. Considering that it has been around since 1978, someone has obviously bred some of these fowl, and it would be interesting to find some stories based on first hand experience.
At any rate, the story began in 1975 with the French Ministry of Agriculture, the head of which was determined to produce a first rate bird for commercial Big Chicken. The project was headed by the firm Institut de Sélection Animale, which is where the name ISA comes from. Three years later, these birds were the result, a hybrid of many varieties, though which ones are considered a trade secret; but the most notable one is the Rhode Island Red.
As a bird designed for Big Chicken, these chicks mature quickly and lay eggs at a fast and furious rate. They are variously said to be short lived, or disease prone, but it is hard to believe that Big Chicken would fall in love with a sickly bird: disposable, yes, but sickly, no. A few small owners say they can live as long as eight years, if given proper care, instead of stuck in a battery cage. As it turns out, this variety has become a favorite with backyard chicken growers, though my chickens are actually in my front yard.
One of the best things about this bird is that it is a sex-link chicken, which means the sexes are different colors. Therefore, if the chick is brown, it is a hen; if it is white, it is a rooster. Thus, these four are definitely hens.
After a week here, they are already flying around the brooder, though there isn’t much runway space in that plastic container. I still put a lid on the insulated contraption to keep them from flying around our basement, or getting burned by the heat lamp.

I have already found them on the top perch, or just cold chilling, sitting on top of the water or feed jars. This morning all four were practicing flying at the same time, which resulted in some spectacular crashes.
Chances are good that my in-laws are in line for some free eggs, as we already regularly have three dozen sitting around our kitchen. Eggs, that is, not in-laws.