
I wonder if the cat did that
This is a junco. I think female due its pale plumage. Apparently, there are a few subspecies of junco. The most common is the Oregon version. They have more brown. Although, with some plumage missing, it's hard to tell.
The cat that might be responsible is a lousy huntress. I've never seen her catch anything. Maybe she got lucky. It's in an area she hangs out at.

The dark-eyed junco is a species of junco, a group of small, grayish New World sparrows. This bird is common across much of temperate North America and in summer ranges far into the Arctic. It is a very variable species, much like the related fox sparrow, and its systematics are still not completely untangled.