I'm probably worrying about nothing, and this is probably perfectly normal. But still. I have a couple of birds hatched about the beginning of June, making them 16 to 18 weeks old. Today I finally got them standing on the scales without much drama. They both came out at about 1500g (3.3lb), which seems pretty hefty for a breed whose standard hen weight is 2000 to 2500g (4.4 to 5.5lb). Are they supposed to have this much of their weight at this age? They feel a lot heavier than their soft and fluffy appearance would suggest, and they're pretty good at wriggling and levering themselves out of my grasp if I don't get their wings held down right, but I can't really tell if they feel substantial or not. What have I got to compare them to? I've never had chickens before. They're bright-eyed and active and they have good appetites. I feed them fermented organic pellets, with wild bird seed as a motivator for scratching a particular area up without my intervention, going where I want them to, or doing what I want. They got a lot more seed than usual today, probably enough for most of the week (it took me a while to figure out how to direct them onto the scales). Sometimes they have access to the compost pile with fresh fruit and vegetable kitchen waste, though I haven't been doing that lately. Most days they get greens, either from cropping the lawn or from being given assorted leaves to munch on.