Black Copper Marans - Time progression of sexing - UPDATED with WEEKs #1-3 PICTURES

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my BCM pullet has some small, almost invisible copper spots on her wings. she is pure BCM.
Can you post a pic. In most cases any copper below the hackle feathers is a sign of a roo. If your sure that it's a pullet, it could be melanisers or just something that may grow out in a month or so.
If she's still young, I would wait and see what it looks like in a few months. If it's still there after seven or eight months, then it may be a problem. Sometimes spots can appear and go away in a few months. It's all a part of growing. If it's getting worst after 6 months, I cull, but I learned not to panic about a white feather tip until they are 7 or 8 months old. I know you said this was copper. That's not commonly seen on a pure BCM pullet below the hackles. If it's a problem at 7 or 8 months, it's likely not going to any better. A white tip on the feathers usually grow out in marans, not always, but in many cases a white tip seen at 3 or 4 months is gone at 6 months. Not sure about yours, but a picture would be very helpful.
 
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Can you post a pic. In most cases any copper below the hackle feathers is a sign of a roo. If your sure that it's a pullet, it could be melanisers or just something that may grow out in a month or so.
If she's still young, I would wait and see what it looks like in a few months. If it's still there after seven or eight months, then it may be a problem. Sometimes spots can appear and go away in a few months. It's all a part of growing. If it's getting worst after 6 months, I cull, but I learned not to panic about a white feather tip until they are 7 or 8 months old. I know you said this was copper. That's not commonly seen on a pure BCM pullet below the hackles. If it's a problem at 7 or 8 months, it's likely not going to any better. A white tip on the feathers usually grow out in marans, not always, but in many cases a white tip seen at 3 or 4 months is gone at 6 months. Not sure about yours, but a picture would be very helpful.

she is about 10 weeks old and those spots are almost invisible. the colour on her chest is more yellowish and laced and on her head is coming darker copper besides yelowish. the breeder has a few hens like that and they all lay dark eggs. my older pullet and 10 weeks old cockerel have dark copper colour. they all come from the same place.
 
Chickengr, what colour are her legs?

all 3 of my BCM have black and feathered legs.1 pullet and a cockerel have dark copper and 1 pullet has some dark copper on her head and copper/yellowish on her chest. it is not yellow but much lighter colour than the others.
 

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