I'm not a rooster specialist. But you have what you have,,, and nothing will change that.
Here is my view about extra roosters. (they are cockerels until a year old)
Raise them in a loving manner, and when time comes,, well, rooster has one bad moment. Still lived a loving life.

You may have to show some closeups to more rooster knowledgeable visitors here.
WISHING YOU BEST,,,,,,,,,,,,,,,,,,,,,,,,
