Multiple Roos and their hen choices

[RumAndCoconuts]

For those of you with larger flocks, this question is for you.
What are your observations as far as Roos over which hens? What I mean is, say you have 3 Roos and 30 hens, does rooster "a" typically have his own birds? Or choose the same ones regularly? Or is it more like back in high school where there are a few popular hens that all the boys go after and some get left out?
Your personal observations would be appreciated.
Just wondering if the mate of a hen can be determined sometimes without segregating the flock.
Thanks in advance!

 

[azelgin]

My three rosters have about 60 hens. They don't share their girlfriends willingly. You can't tell who the sire of a chick will be, as "adultery" will take place. A hen squawks as the wrong rooster mates, the proper rooster rushes to the scene, but too late, the deed is done.
When I'm looking to incubate eggs from the parents I want, the preferred birds are separated from the rest of the flock for two weeks, before I collect eggs for hatching. After I get the numbers I'm after, they're turned loose again.