I weighed the chickens, bagged. Just like the grocery store says, I'm sure that includes some water weight, but I can't imagine that it amounts to very much. I also round down to the nearest 1/4 pound, unless it's within 0.03 lbs of the next weight, so realistically on average, each chicken probably weighed about 0.12 lbs more.
Ok, so how much did they weigh? Our average was 5.75 lbs. That's 1/4 pound higher than I would have expected, so I'm quite pleased with that.
At this point I can only guess at their feed conversion. Having used 3800 lbs of feed for 146 birds, 75 of which had a dressed weight of 5.75 lbs average, we get
(75/146 X 3800)/(5.75 X 75) = 1952 lbs of feed (est) / 431.25 lbs of chicken = FCR of 4.5 (dressed weight). Multiplying by 2/3 gives us an estimated FCR of 3.0 (live weight).
Of course, this could change a little based on next week's results, but I think 3.0 is probably the magic number here. If we had processed them a week or two ago, it might be 2.8 or 2.9. That's not bad.
Other thoughts:
My processor said something like, "Normally, we get those colored chickens in here and they are a real pain. But these weren't too bad." Even so, he said they were more difficult than a normal cornish cross. I think he said they were harder to pluck, because they were a bit firmer, even than a cornish cross of the same age.
We haven't eaten one yet, but that will probably happen in the next few days.