Tamed dogs and cats won't stand/sit when commanded (UUID written to the OwnerUUID without hyphen)

The bug

I, on my survival world, recently tamed two cats and four wolves. All six animals are named with name tags, the cats were tied up with leads inside my house, the four dogs were untethered and just sitting outside my house.

After using these two recent snapshots (14w10a then 14w10b), my animals stopped followed the right-click 'sit/stand' command.