Schedule-Induced Polydipsia: Species Limitations

Abstract

5 male hamsters were reduced to 80% ad lib. weight and were run in a 3-hr. session with a VI-60 sec. schedule for 20-mg. pellets for 14 consecutive days. Water was freely available at all times. As hamsters did not exhibit the excessive drinking characteristic of other animals under similar paradigms, there appears to be a species limitation to schedule-induced polydipsia.