Wendy,
I am sorry that you lost your hen. Don't blame yourself for what happened. You can only do so much to protect your flock. It definitely looks like a weasel or mink, or a fischer cat(which is a member of the weasel family).
They have a nasty habit of biting the heads off first and then deboweling their victims if they have the time. If it was a mink you'd know, as they tend to leave an odor around their kills, much like a skunk does.
Foxes not only can dig, but they can also climb up fencing. But usually foxes take their victims away from the kill site. Coons will try to find the easiest way into something, but they can also figure out how to undo simple locks, get lids off garbage cans and so on.
Someone already suggested to put in a cement foundation around your run and to dig and put wire dug into the ground as well. You might also want to install those clasp locks on your doors and gates.
I am sorry that you lost your hen. Don't blame yourself for what happened. You can only do so much to protect your flock. It definitely looks like a weasel or mink, or a fischer cat(which is a member of the weasel family).
They have a nasty habit of biting the heads off first and then deboweling their victims if they have the time. If it was a mink you'd know, as they tend to leave an odor around their kills, much like a skunk does.
Foxes not only can dig, but they can also climb up fencing. But usually foxes take their victims away from the kill site. Coons will try to find the easiest way into something, but they can also figure out how to undo simple locks, get lids off garbage cans and so on.
Someone already suggested to put in a cement foundation around your run and to dig and put wire dug into the ground as well. You might also want to install those clasp locks on your doors and gates.