If you want pure birds, you have to seperate the pens. How old are the younger males? It's possible to get blue birds from splash and non blue gened parents. If a splash or blue bird bred with your white male, you could get blue offspring if the white isn't hiding anything and it's not homozygous for dominant white. Chicks from a splash x red breeding would likely look blue at hatch and feather in with red in the hackles and saddles in males and in the breasts of females.
What do you have for females? If you only have splash females and the chick ends up being a blue, it's a mix. If your other males are too young, they may not even be breeding yet.
Can you post a pic of the chicks?
What do you have for females? If you only have splash females and the chick ends up being a blue, it's a mix. If your other males are too young, they may not even be breeding yet.
Can you post a pic of the chicks?
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