I think it may have been a critter that did this:

Just found this plant with 23 leaves all over the place...they were not chewed on or otherwise damaged, just broken off. Mostly from one side, so I wonder if some furry friend tried to lay down...Plant was outside, and I do not see any ter damaged. I do not have any pets, and there are no kids around either. But there are squirrels and chipmunks around, and other ppl's cats visit often. So I think I will behead the plant and propagate the leaves - all are very healthy. Should anyone in Canada want few leaves, just let me know. (or anywhere - but shipping may be bit of a problem out of Canada...)