Why are Japanese Bantam chicks never offered sexed?

[Sarjopepper]

Pretty much what the title says. Why are Japanese bantams, silkies, and some other bantams never offered as non-straight run? Is there something about them that makes it more difficult to sex them than the average/larger fowl chick? Thanks!

PS: To be fair I have only been looking at online hatcheries so far. Chickens are a project in the distant future.

 

[QueenMisha]

The only methods of sexing which are accurate at one day of age are vent sexing and sexing by breeding of sex links. Bantams are too small to vent sex accurately without a good chance of injuring or killing them, and sex linked breeding of varieties hasn't generally been pursued by large hatcheries except in your typical Red and Black sex linked crosses.

 

[Sarjopepper]

Thank you!