Who Survived?

I have the tune running through my head now--how does it go? "I met an old lady who swallowed a fly, I don't know why she swallowed a fly, I guess she'll die."

And the song continues to build so that each thing has swallowed the other and the next and the next until I don't know who's left.

I think something like that has happened to our pig.

I can't be sure. But I smell a rat. More importantly, I don't smell a pig.

Further clues consist of the following:

The pighouse/doghouse has disappeared.
The boxer has disappeared.
The big headed black labs have disappeared.
The pig himself has disappeared.
I have seen no sign of the neighbors.
The fence is still in disrepair.

I wonder who ate whom?