Okay . . . let's see . . . hatched first week of May. So he'd be one month old on June 7th, two months July 7th, and so on. That means he's going to be TRULY six months old this week. And if his hatch-mates aren't laying, that's actually a good sign - as in, there is probably nothing really "wrong" with him. You know, I don't know how they figure this stuff out, but the baby hens, it seems all the roos will pretty much leave them alone, then suddenly, they lay an egg and the roos just KNOW that it's finally time to fertilize the eggs.
The young roos may try jumping on the non-laying pullets, but all my experienced boys out there are totally, completely ignoring my half Swedish hens in there. I have NINE half-Swedish half-Aloha hens, and my adult roos won't even look at them right now. They are five months old and should start laying in December. But to the mature guys, they don't even exist.
But the second the first pullet eggs show up in the nest box, I get the roos jumping all over those hens! It's really funny how they seem to know when it's finally time. So the fact he's tagging the adult hens and ignoring the non-laying hens sounds about appropriate for a young, immature roo who is just now getting old enough to actively breed. I bet you the second those hens of yours start laying, you'll suddenly start getting fertile eggs from EVERYBODY.
If you feel there are too many hens, though, we can take Hendini and a few of the others over to Laree's house now, and leave him with only the most important hens - your "keeper" hens you've picked out from hatches, and the two hens from the Sussex/Buff Barred Mottled specialty pen. (If you think smaller numbers might help fertility, or ease his performance anxiety.) LOL!