I have bourbon red turkeys who were born in June, I still have no idea if I have all boys or if there are a few girls in the mix. The past two weeks I have noticed a big growth spurt with all but two getting quite big. I am guessing those two too be hens but... They all have red heads and necks until they eat then the are grey. Only one has the worm like thing on their beak- pretty sure that one is a boy. So when can you tell? For the BB turkeys I could tell the first month but with these I just can't tell.