My flock was murdered last night.

We had our first flock of 6 hens for almost a year before my dad woke me up to tell me an animal had gotten in and killed them and left the remains. I haven't inspected the area yet as there are apparently still feathers everywhere and it's been less than an hour since I found out, but the animal burrowed under the chicken wire/bent it up to get in.

We hadn't secured the bottom of the wire into the ground as we didn't expect this issue (again, first time chicken owners), so it wasn't the hardest thing to do to bend it up and get in. What is the best method for securing the wire into the ground?

I'm also extremely upset so I'd appreciate not dragging me for not properly securing it in the first place. Any advice/consolation is appreciated.