Well.... it's complicated and I didn't want to bore you with the details but here goes:
I have 11 sexlink hens which range in age from 7 to 20 months old (8 are laying), as well as 5 silkies (3 are about 10 months old, 3 are 5 months old), 1 sultan pullet who is 7 months old and laying, 2 cochin pullets about 5 months old, 1 LF brahma pullet 3.5 months old and another one 2.5 months old, and an EE cockerel about 3.5 months old, not sure, and another one who is sick and about 5 months old. Whew.
I know it's normal for the youngsters to not be filled out yet, but it's the adults I'm concerned about.
The flock adults free-ranged up until the first snowfall about 5 weeks ago, they now just hang out in the coop waiting for spring. They are all fairly laid-back and eat like little piggies, they seem healthy otherwise - no sign of any parasites or anything.
I probably just worry too much!