So I waited an extra week to start weighing the chicks and their feed. Here's the starting point. Note that the cornish cross are twice to three times as heavy as the heritage breed chicks. I suspect they've also eaten twice to three times the amount of feed, but I can't tell for sure.
I've fed 175lbs of food so far to the 290 chicks in this batch; about 8 ounces to each chick, on average.
From here on I'll weigh each chick each week and also the food given to each group of chicks and post it each week on Tuesday.
Pictures of one of each of the chicks and their weights below.
speckled sussex? 10 chicks, weight after 2 weeks: 3.5, 3.25, 3.75, 4.25 4.5, 3.25, 4.25, 3.75, 4.5, 3.75
Rhode island red? 10 chicks, weight after 2 weeks: 4.25, 4, 3.75, 3.75, 4.25, 4.75, 5.5, 4.75, 4, 3.75
barred rock? 10 chicks, weight at 2 weeks: 3.75, 4,3,3.25, 3.5, 3.5, 3.25, 3.5, 2.75, 3.5
I believe these to be "light brahmas". They have feathered feet. 10 chickens, weight after 2 weeks (ounces) 4, 4, 3.5, 4.5, 4.75, 4, 4, 4.75, 4.25, 4.25
Cornish Cross: 10 chickens. Weight after 2 weeks (ounces) 11.25, 9.25, 11, 12.25, 9.75, 8.5, 9.25, 12.5, 11.25, 10.25