The more information you can gather on each bird will help so you would really want to do monthly weighing. It's easy to do when they are poults but when they get 5 - 6 months old it's more of a challenge. Think of it as good cardio to run them down and hold on to them while you step on a scale. 
We don't do anything out of the ordinary with the poults. We have various sizes of brooder boxes in the barn and as they grow they get moved to a bigger box, from there they go outside to a covered pen. As they grow they are fed a 28% medicated sporting bird starter from Southern States feed. When they are fully feathered out and it's warmer we turn them out with breeder flocks. About 5 months of age, it warms up here pretty early in the spring but we have to watch out for those heavy afternoon thunder storms. The young ones can get soaked and chilled in the those very quickly.

We don't do anything out of the ordinary with the poults. We have various sizes of brooder boxes in the barn and as they grow they get moved to a bigger box, from there they go outside to a covered pen. As they grow they are fed a 28% medicated sporting bird starter from Southern States feed. When they are fully feathered out and it's warmer we turn them out with breeder flocks. About 5 months of age, it warms up here pretty early in the spring but we have to watch out for those heavy afternoon thunder storms. The young ones can get soaked and chilled in the those very quickly.