What are ISO's?

Discussion in 'General breed discussions & FAQ' started by Mrs. Feathers, Mar 25, 2012.

  1. Mrs. Feathers

    Mrs. Feathers Chillin' With My Peeps

    Apr 2, 2010
    Can someone please tell me what ISO stands for?
    We have hatched each year from eggs from a local breedern but this year we are going to buy chicks. When I checked at our local feed store I was told they stock Sussex, RIR and ISO. What on earth are ISO?
  2. Ridgerunner

    Ridgerunner True BYC Addict

    Feb 2, 2009
    Northwest Arkansas
    I'm guessing they are talking about an ISA, probably ISA Brown. That is a type of commercial laying chicken. They have been bred to lay a lot of large eggs early in the commercial situation. They have a relatively small body so they are more efficient at using the feed to make eggs instead of using it to maintain a large body like the RIR, for example.

    One possible drawback, they can burn out after a hard year of laying eggs. Thye are specialized chickens, specially bred for commercial laying operations which replace their chickens after their laying cycle. They are not bred for longevity. If you watch their feed a bit and don't overfeed them, they have a better chance of lasting through extra seasons and still laying great.

    Many people get them and love them. It depends some on your goals.
  3. Mrs. Feathers

    Mrs. Feathers Chillin' With My Peeps

    Apr 2, 2010
    Thanks so much for the information...yes it was ISA...I am clueless stepping out of my Australorp/Americauna bubble.
  4. hennrietta

    hennrietta New Egg

    Jun 30, 2016
    An ISO is a cross between a Buff Orpington and a Rhoade Island Red.
  5. Nikalete

    Nikalete New Egg

    Nov 23, 2016
    Mine are ISO brown. They do lay larger eggs. Lots of double yolks and even a triple here and there! They are consistent in number but not in size.

    How long is the egg production expectation of the ISO, since you say it's shortened?

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