Weighing birds

I'm striving to achieve the standard of perfection for my chosen breeds (Orpingtons, Cochins and Chanteclers). But in the past, I haven't been consistent with weighing my birds. I'd like some opinions on when to start weighing them and how often.
Also, how do you know if young birds are 'on target', so to speak with the adult weight goal? Are there comparisons available to gauge their growth rate? Or do most breeders just compare growth within their own group of chicks to see who is performing best? Do you record and track the fastest growers? Or is that much detail even necessary for slow-growing heritage breeds?

So many questions! Anyone's opinions are most welcome!!

Hi KathyS, when I weigh my cockerels I do it just when they start to get that 'beginning' crow we all snicker at! To me that is when they have reached 'manhood' and soon will be vying for the ladies attention. That is also when they are off to freezer camp and I like to have a weight on them before they get butchered because I like to compare the dressed weight. I would like to keep more roosters but just don't have that luxury. I do keep some records of weights but have really slacked off on that! This is just what I do but I am curious too what others do.

XOX Monika