Heavier? Good googly! After seeing Robin's birds, my BF asked me what I've been doing wrong because our birds look scrawny in comparison. Of course all the adult birds we have at the moment are hatchery stock from before I knew any better! They're egg machines, but leave a lot to be desired physically.Your right but some of Robins are nice - I just weighed this AM at 19 weeks and Robins Hens averaged heavier than Kathys line - however the Cockerels of Kathys line average heavier than Robins - keep in mind I have a limited # of pullets from Kathys line [ 5] - More on weights later - don't have time today.