The cunningness of it all makes me think raccoon too, but I've also never heard of a raccoon eating the entire bird (or large group of birds) on site. I've heard of them ripping off heads, eating crops and leaving the rest, or just eating part, but never entire bodies. I feel like that would have to be something big. Maybe a raccoon opened everything and something bigger came in and cleaned up? Bizarre.
I'm so sorry for all of your losses. That's horrific. Especially the sweet little babies and momma
I'm glad you found one at least. Too bad it can't talk and tell you what happened.
If it were me, I'd take your poor little survivor, set it up in the garage again with a live feed game camera on it, and sit waiting with a gun. When whatever it is comes back to finish the job, run in there and shoot it (hopefully without damaging your garage...) Might be some holes in that plan, but that's what I'd do.
I'm so sorry for all of your losses. That's horrific. Especially the sweet little babies and momma

If it were me, I'd take your poor little survivor, set it up in the garage again with a live feed game camera on it, and sit waiting with a gun. When whatever it is comes back to finish the job, run in there and shoot it (hopefully without damaging your garage...) Might be some holes in that plan, but that's what I'd do.