When do Doms start to lay on average? Ours are 20 weeks old and one only weighs 2.65 pounds while the other one (Sunny) weighs 3.45 lb, and all of the sexlinks weigh about 4.35 pounds.
Mine average 20 weeks when they start to lay. Some have started a little earlier, some a little later. Dom pullets will be slightly smaller on average than most large egg laying breeds, as Doms are a dual purpose breed.