Sexing French Black Copper Marans

Unless you have the experience and the expertise it is very very hard to sex them that young. However, if and when they start developing their combs, the ones with the taller and thicker ones will most likely turn out to be roosters. This is how I usually go by. I would say it is 85% accurate
 
I have been told that sometimes the feet of the females will be a little darker than the males after the first week. So far, it seems to be true of mine.
 
You could post a picture for us.

Or just wait another week!
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This has been posted several times here on the board.

According to UC Davis Veterinary Care Program.
Physical Characteristics (4-6 weeks of age)
a. Comb – The cockerels comb is medium size and pinkish, the
pullets is small and yellowish.
b. Legs – The cockerel’s legs are sturdy and long, the pullets are
finer and shorter.
c. Tail – The cockerel’s tail is stumpy and curved, the pullets is
longer and straight.
d. Back – The cockerel has a thin line of stub feathers down the
center of his back, the pullet has more advanced feathering along the
center of her back.
e. Side of neck, flank and crop – The feathering in the cockerel
in these areas is poorly advanced, the pullets feathering in these
areas is well advanced.
f. Wing bows – In the cockerel the wing bows are bare, in pullets
the wing bows are covered with small feathers.
 
Does the tail grow quicker on the pullet or cockerel. On some of mine, the tail growth is almost non-existent or they have little stubs, no in-between at 4 weeks and even the 2 week olds.
 
I read -somewhere - That cockerel tail feathers grow in slower than pullets. Something to do with being larger curved feathers? The same on the neck mantle.
 

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