The kids discovered that Cameo was missing when they went to catch the school bus today. We have combed the entire pasture and all around the fences, and cannot find anything to indicate what happened to her. We suspect a bobcat, because coyotes usually leave more signs, but we don't have any hard evidence.
As a result of Cameo's disappearance, Piper is no longer for sale. As always, we would still consider negotiating trades, but right now we'd rather wait until we have a daughter out of her before we sell her.