How useful is data to you and how would you use it? If the data showed that your smallest, ugliest, least feathered bird and biggest eater was your best egg layer, would you breed it for more eggs?
ROFL!! I drove my husband crazy a couple of years ago weighing chicks every week or two. I think that much data was/is overkill. Instead of open-ended data collection, I am more focused on specific goals this year. I want my flock to produce broilers/fryers with a decent amount of meat on their bones, so I will weigh chicks at ~ 8 weeks (broiler age) and ~16 weeks (fryer age). We will butcher the lightest one third at those ages. I also want my birds to reach the Standard weights in a reasonable amount of time so will weigh at 6 months and 12 months. I will use that data (plus a few other points) to choose the next generation of breeders. So, no, the smallest ones don't hang around long enough to come into lay.
Best wishes,
Angela