New Flock bought March 1st. 20 weeks old

[Ben_2288]

Here are my production red, ISA brown and RIR. I bought all brown egg layers i can't tell witch is which they all mix

 

[Sneebsey]

The RIR will be the ones with black tails and a darker mahogany colour; I see three possibles, all in the middle in the first picture. Can't help with the other two; I believe they look very similar, with the only difference being the sex-linkage present in the ISA at hatch.

 

[Gray Farms]

Best I can tell.

 

[drumstick diva]

agree

 

[Lady of McCamley]

Agreed.
All red birds with white leakage are your Sexlinks (Gold Comets, RSL, whatever they called them at the hatchery this time).

All solid red birds are the PR's

Birds that are dark red with black tails, and often darker hackles at neck, RIR.

LofMc