Not every odd egg is a virus issue. I had a few soft eggs like this when my jumbos just started laying, if it continues consult a vet but don't jump to "EVERY BIRD HAS TO DIE" please.
You could wrap a thick towel or small blanket around the incubator to help it hold it's heat better too. I have a borotto which hasn't seen many fluctuations but the motor is on the outside so that's probbably why.
They do have shelter, they have half the pen blocked from all weather and they are under a second story deck to further protect them. The storm was very intense. Even my dogs were on edge and they are usually chill during storms.
So last night we had a terrible thunderstorm, it was intense even though it was fairly short. About 15-20 min of lightning flying. I refilled the water shortly before the storm and everyone was doing good, starting to settle in for the night.
This morning I went out and one of my biggest hens...
So I ordered 25 gold mix chicks from MyShire and was hoping for 12-14 chicks since mailed eggs can be iffy. I ended up with 21 babies, not a single loss yet from them and they are now a week old. I'm so excited. I got these because they are said to be great layers. Now I'll have my jumbos for...
I would put all four hens with the nicer roo and remove the aggressive one from my stock. I have a strict "No blood" policy with animals I raise. If they are aggressive to the point of drawing blood I won't have them on my homestead. But that's just me.
I was just reading that so no telling yet.... i will have to just err on the side of hen safety and only put 1 roo in the cage with that one and its flock til I know for sure.