What do we think is hunting in my yard at night?

I've lived in Bellingham 6 years. The first 5.9 years: no dead animals in my backyard. In the last three weeks, we have found an intact (dead) mole, an eviscerated (dead) baby bunny, and this morning, pieces of what I think was a squirrel. If any wildlife enthusiasts would like to venture a guess as to what has moved into my bushes, I'd appreciate it.

We don't own a cat, but several of my neighbors do. I do have a doggy, but he has discovered two of these three creatures with me, first thing in the morning, so he has an alibi.

I do have a picture of the squirrel (?) pieces, available upon request.