Is it possible to determine sex of chicks at hatch if they are a cross between RI red and isa brown hen?
No, if you cross an ISA Brown and a Rhode Island Red together, the chicks will not be sex-linked. The only way to sex them would be through vent sexing.
X2 on Wyandottes7's post. Vent sexing is a method used by chicken sexers to sex newly hatched chicks in which they open up the chick's anal vent (called a cloaca) slightly, allowing the sexer to see if the chick has a small "bump", which would indicate that the chick is a male.
