Huh. Well, it’s best to breed non-aggressive roosters if you want non-aggressive cockerels. However, genetics isn’t a guarantee that they’ll become aggressive.
If you do end up separating the cockerels from your hens, you could try to put them in with their father. One thing to consider is that...
The chick in this thread is definitely barred, but I’m less certain about the two with red dots. If their feathers grow in without white stripes, then I’m wrong and they’re pullets.
How is the temperament of the father, if he’s your chicken?
Also, out of curiosity, why don’t you keep all three...
The white dot is the thing that signifies barring, not the red dot. Sorry I didn’t clarify before. The chicks with the red dots also appear to have white dots, which is why I think they’re barred cockerels.