Re: Concerned longtime squirrel feeder
Welcome to TSB!
As you know, there are lots of different predators out there - not just cats. Your picture did not post, so I'm taking a bit of a stab in the dark. Here's a short list of possible suspects in the Midwest: Raccoons, foxes, coyotes, bobcats, mountain lions, and snakes. Also on the list, and I especially wonder about these, are predatory birds and raptors. With the injury always showing up in the same area on the squirrel, do you think it is possible that a nest of raptors exists on the other end of a trajectory that leads directly to where the squirrel will run when it senses danger? The raptor's talons would usually strike in somewhat the same spot as the squirrel is fleeing. Again, this is a stab in the dark. Pictures of the wounds will help a great deal.
Hardwoods have greened up so it will be harder to see, but you might want to go to where your squirrels live and look up and around for signs of large nests. If they're there, you might see one or more of the raptors. Depending on what's up there and their mating season, you might hear babies calling for food. Regardless, pictures will help so much.
Thanks,
Jamie
"some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence