So, I separated my splash hen from the flock. She has a broken leg or something and the rooster won't leave her alone

poor girl. So she's in solitary confinement
meanwhile, I have 3 eggs in the incubator that I'm not sure are fertile or not. But I'll find out in a few more days! I hope they are. I cracked one open and I just couldn't tell if it was fertile. it looked like some of the fertile pictures I saw online, but not all of them. I compared with my non fertile hens ( no rooster in that pen) and it definitely looked different... so we'll see! In they went. why not. right?