Huh?? Not unlikely at all? OK, what wild animal is going to hop up on a front porch in suburbia and eat the babies? I mean, really. I'm from Alaska and even bears -- it's SO SO SO unlikely that they ever attack people, and if they do it's out in the woods when they get surprised by someone coming along. I can't think of what other wild animal would eat babies.... I've never even heard of it happening! Besides, the mama says she can see them.
OP, keep doing what you're doing. It's fine, totally fine!
Maybe a swarm of killer bees?
Yeah, i am with you.