In the begining my neighbors chickens 2 same breed as mine looked heavier. I think that is because hers was kept in a small 4x4 ft dog pen with a dog house inside the pen. Mine are out all day in the fenced in yard doing what chickens do best. When she finally got them a bigger area hers and mine look the same. I think cause mine had room to roam and hers didnt they fattened up faster. Also she gave them lots of scratch with thier feed and mine got it only as a treat. If your friends birds eat that much they are either wasting alot or very bored and thats all they have to do. Its not good for the birds to be fat just like people. Its also not good to be very skinny. My birds are very healthy never knock on wood had any problems with them they are 27 weeks and laying well, but they are not heavy or what I consider heavy birds. Weigh them. standard breeds should weigh around 4-5 lbs fully grown. an easy way to weigh is to get on scales and weigh yourself then pick up a bird and reweigh. Of course rooster weigh more.
