Yes they are extra roosters of the dual purpose type. I will ask if anyone has ever tried to raise them out in chicken tractors and little or no extra "treats" or feed just pasture raised. From what I read on other threads there is at best 1 or 2 hens usually none. makes me wonder if the hatcheries can actually be 99.99% accurate but choose to be only 90 or 95% accurate. unless they send you auto sex bird how can they get 100 or 200 bird order all male?????
Ameraucanas are small. I have one ameraucana hen and she's smaller than my 16-week-old mixed-large-breed chicks and about a third the size of my brahma/orp x roo. I would not bother with them for meat. On the other hand, a portion of my flock are crosses of 25-50% ameraucana, with the other 50-75% being australorp and/or marans; those birds took on the size of the large breed, with the one mixed hen being only slightly smaller than the marans hens.