An excellent characterization of young ameraucanas! They are absolutely xenophobic at any movement or sound.That, too, varies. Depends on age, breed, and temperament. Ameraucanas are freakazoids when they are young . With the cost of feed nowadays, they are not filled to capacity. There are formulas for number of square feet to bird ratios, but what one breed tolerates and does well in, won't work for another. Even varieties within the same breed can be widely different.