There was no difference between a chick that was totally full of worms and couldn't have handled any more worms, but still as it were, behaved as if it was on the point of starvation, and a chick that was really hungry, had in fact, observation shows that, what parents do when they come back with, with the food is, very often they, they probe the throats of the chicks with their beaks, to see which one's got much most room before they actually put the food in.