A floating insulator assembly is configured to be used with a stock tank that is configured to retain water. The assembly may include an insulating member configured to float on water within the stock tank, and a chew deterrent extending from at least a portion of the insulating member. The chew deterrent includes a plurality of chew-deterring protuberances that outwardly extend from at least portion of the insulating member. The chew deterrent is configured to deter an animal from biting or otherwise grasping.
