I'm no expert but my first bird to lay squatted 3 weeks ago at about 21 weeks and laid within a week and 9 others are laying here by 25 weeks. From what I've heard and read the normal range is anywhere from 16 weeks for the hybrids all the way to 26 or even 30 for a slower maturing bird. So 18 weeks sounds early but not abnormally so. Lucky you!
Thanks, and yeah, I'm finding it a bit strange, these are supposedly not hybrids. Lol!
The only other experience I have is with my first flock. They are all Silver Spangled Hamburgs and would rather hit you with a wing than squat for you, flighty and aloof for sure. The first one to lay was 26 weeks and the last in that flock was around 32 weeks , so I'm kind of in shock to see this kind of behavior so early. Keeping my fingers crossed here because the Hamburgs haven't laid an egg in a couple of months now!