Sickness
From PinataIsland.info, the Viva Piñata wiki
A good gardener keeps his piñata happy and healthy, but that's not always easy! When piñata fight, eat sick candy, eat poisonous plants, or are not given enough room to roam, they may become sick. A sick piñata lies on the ground looking and sounding miserable.
You may call Doc Patchingo to heal a sick piñata for a small fee. If left untreated, the witch doctor Dastardos will make his way to the sick piñata and break it.
