Thin cochin bantam

[Tabi6977]

For the life of me I can't get my cochin bantams to put ANY meat on their breast bones. I have several different pens with different colors from different lines. They get 20% layer feed and booneworms and I sprout lentils. They get fresh clean water 2 times a day with it always available to them as well as their feed. No worms. No mites or lice. My silver laced pen has meat on them, as the rest are only bones. What am I doing wrong? They are active and happy.

 

[Lacy Duckwing]

How old are they? Are they currently laying? Can you weigh them to get an exact weight on them?

 

[Tabi6977]

They are a year old and laying. I can weigh them tomorrow. I have a digital scale.