What breeds can you sex as chicks?

[Krys109uk]

Yes, I think so, which makes them sexlinks.

No they're not sex linked crosses but proper breeds. The idea behind the autosexing breeds is not difficult. Basically putting barring onto non black birds.​

 

[Glenda L Heywood]

If RIReds come sexed they were done by those who do sexing in the vent
generally chineese or japanese
our hatchery used to hire them in the 1950-1980s
here are a couple articles by article from Dr Ron Okimoto
and one by myself on sexing chicks

BARRING & SLOW FEATHERING
Dr Ron Okimoto

I think that slow-feathering works the way you describe for enhancing barring, but the published
literature says that we are wrong. Sex-linked late-feathering is called late-feathering instead of
slow-feathering because the rate of feather growth is not changed, but the timing of feather erruption in
the different feather tracts is altered to a later time.

I don't agree with these finding, but I've never taken a ruler and measured the rate of feather growth
in late-feathering birds compared to early-feathering birds. Until I do I have to go along with the guys
that have done the measurements.

This claim just seems wrong. My unscientific observations tell me that feather growth is slowed
down especially in the long feathers of the tail and wings. Even after they start to grow, these feathers
do not elongate as fast as early-feathering birds.

Anyone that has raised these birds can tell you that even though a late-feathering bird has primary flights at hatch, by 10 days the wing feathers are a full 1/3 shorter than early feathering birds. For the
late-feathering claim to hold the early feathering embryos would have to have feathers the same length as late-feathering chicks as much as 3-4 days before hatch.

Biology is a strange science, and if I did do the measurements correctly, I'd probably find that the
guys that did the original research are right, because I have no good reason why they should be wrong. Looks can be deceiving.?


SEXING BABY CHICKS
From: Ron Okimoto


Dominant white produces a white downed chick that cannot be sexed by the head spot on a black chick. You can't use sex-linked barring to sex chicks when dominant white is present. You simply can't see the difference because you can't see the head spots.

Dominant white birds are sex using sex-linked late-feathering. This trait is dominant you can see it in the chick wing feathers. Coverts (the feathers in the layer above the primary flights) are shorter than the primaries for early-feathering chicks and coverts are as long or longer than the primaries for late-feathering chicks. Late-feathering chicks take longer to feather out and usually have sparse tails with feathers shorter than 1 cm by 10 days of age, while early feathering chicks have pretty full tails and feathers longer than 1 cm by 10 days of age. To sex day old chicks you have to breed an early feathering male to late-feathering females. All the male chicks will be late-feathering and all the female chicks will be early feathering WING FEATHER SEXING OF CHICKS
By
Glenda L Heywood

Many people like to tell the sex of their chicks this question was asked of me and here is the answer sent to me.
Glenda L Heywood

ANSWER
the theory on wing-sexing is this:
the growth rate of feathers is sex linked. the short story is that the males two x chromosomes(called w chromosomes in poultry) and the hen has a x (w) and a y(z)

Poultry chromosomes are the opposite of people.
The result of this is that basically, if the bird's wing feathers grow fast (when it is a little chick), it is more likely (but not 100% by any means) to be a female.

A slow wing feather growth is more likely a male, but again, not 100% or even close, maybe more like 70% i'd say.

Now my own experience was totally different In My Cochin Frizzles the slow feathering chick was always a female So I believe it is genetically controlled.
Glenda L Heywood

 

[Krys109uk]

To avoid confusion......With aves the males are homogametic having two Z chromosomes.

 

[Long Horn Poultry Farm]

Quote:
Hi Fruit Juice


In the Salmon Faverolles at only a few days old the males will have dark brown to black wing feathers and the females will have light brown wing feathers.




Long Horn Poultry Farm

 

[chickenman98]

i heard u can sex all of em' u hold them by the neck and if they go limp they are hens, and if they fight and squirm then they are rooters. is that true? i heard it was 95% of the time

 

[gryeyes]

Quote:
Nope, that's a myth.