Pullets getting killed

[BOATMAN]

Weasels. They can get through a two inch diameter hole by digging or a hole in the chicken wire.

 

[el pollo rey]

Any updates ?

 

[JanetS]

I hope they didn't lose any more chicks.

 

[BigGameHunter]

Sorry for the long wait lol, I've been busy. So far, I only lost one more chicken, the Cornish Rock again. Nothing happened since that one died, and that was last month. I'm starting to wonder if it wasn't any predator.. because I have some white Leghorns who have had their tail feathers ripped off and bleeding, but not bitten.
I raised all my chciens since they were about 6 weeks old, and their about 12 weeks now. I had the Cornish Rocks in a different box, and I had my silver-laced Wyandottes and Leghorns in the different box also (the Wyan.'s and Leghorns were together.). I have heard that if a new chicken comes around, there's a possibility that the other chickens won't accept them. I'm wondering if when I put them all together in our chicken coop, the Wyan.'s and Leghorns didn't accept them. Because when I lost my first four, it was two Rocks, one Wyan., and one Leghorn. So there could have been some type of figh, but I'm not 100% sure.
Thanks for all your replies. If you have anything else to say, don't be afraid to!