On the border between the woods and the lawn, near where I planted the tree, I saw this.  It looks like a coyote or hawk got hold of a skunk, and tore it up.  Lucky I found this before Sparky did, and unlucky if there is a skunk family in the neighborhood.

Upon further investigation, it turned out to be a killer whale plushie dog toy I gave Sparky last year. 

When Sparky gets excited, sometimes he brings a toy outside when we go for a walk.  He usually drops it when he gets tired of carrying it, but he’s pretty good about remembering to pick it up before we go back inside.