How horrifying! I’m one of those who considers pets family, so I would be destroyed with grief.
Mountain lions chowing down on pets happens frequently, but it is not common for them to come into a house to do so.
This is the second case that I have heard of.
Coyotes chowing down on pets is very common. I have heard of several cases second hand in Yuma. But I have not heard of them entering homes. Yards, yes. Homes, no.