I am very impressed with the comb & wattle growth of chick 10, in the last 8 days (since the previous update.) That is a beautiful example of how fast they can change!
I really like how well you are documenting the growth and development of these chicks :)
The Spangled OEGB chicks I bought some years ago looked like normal BBR chicks to me. I've never learned how to sex them by appearance, so I can't say for sure whether that would work or not. Mine were from Welp Hatchery, not Ideal. I don't know if that makes any difference either.