Sinonsauropteryx allow themselves to starve and/or thirst stupidly. When they are hungry they sometimes go straight ahead in the opposite direction of the feeder which is nevertheless in their territory. Sometimes they are looking for food and are about to die of hunger but they move forward and pass by the feeder without even looking at it. I even saw them cross a water point without drinking when they were dehydrated. And when some finally decide to go to a feeder, they walk there slowly as they starve and their stamina level is filled.