first post , i just got back into meat chickens again this year and have 40 healthy 6 week old birds with the exeption of 1 who grew like the rest until week 3 now he has hit a bump in the road . He still has the yellow down on his head and very few feathers covering his body . He eats and drinks well and gets around good . He just stopped growing and is less than 1/2 the size of the rest . Just wondering if this a common thing ?