But I stopped, to see if I could help.
The poor creature was writhing away, slowly choking up its last meal, which turned out to be probably five meadow voles (Microtus pennsylvanicus). It brought up three, an adult and two babies, but I could see there was at least another vole or two still in there.
It wasn't easy to identify the prey, slimed as it was, but I could see the incisors were yellow, not red, and rodenty in form, so that ruled out the only other like-sized short-tailed mammal it could have been, Blarina brevicaudata, the short-tailed shrew. Nope, it's a meadow vole.
And two babies, which probably wasn't an accident--it had probably surprised a whole family, grabbed the babies and then taken down the mother. The mother came out first, so she was taken last.
Within minutes the greenbottle flies were there, looking to lay their eggs, perhaps. I can't be sure, but this might be Lucilia sericata. A beautiful name for a stunning fly.
I am sorry, Snake, but there are so many more thoughtless people than kind ones in this mean old world. I stroked its soft skin but it was already gone, gone to a meadow far away, to bask on a road without meanness or cruelty.