Bobwhite eggs are getting beat up

The bobwhite eggs I've been collecting for the last 2 months have had what looks like one tiny peck hole in about 10% of the eggs.

Are they trying to eat the eggs? When the hens go broody, are the males trying to break the eggs? I've had 3-4 hens stay on their nests for a few days. I have maybe 35 birds in the flight pen, so there's no way I can tell what's going on with the broken eggs. Once in a while, I'll see a completely cracked egg, and I'll get it right out so they won't eat it. But who knows? Maybe they're eating the eggs and I wouldn't know.

What's your best guess for what's going on?

After my next hatch, we'll probably not collect eggs for setting again, so it's not the end of the world. But I'd like to know.