Missing pets are because people don't spend enough time with their animals to form a pack attachment (for dogs) and cats just don't give a shit.

Or. . . The encroachment of suburbs in currently rural areas means coyotes and pets come in contact. . .

Also I still live on the farm. And animals here can be dumb as hell as well. Our neighbors miniature donkey regularly escapes, just to get his head stuck in the fence trying to get to his food trough from the outside.