An improved animal trough includes an outer wall, an inner wall, a receptacle configured to receive a first fluid, and a housing separated from the receptacle. The receptacle is substantially smooth in order to prevent or discourage the growth of algae or the buildup or dirt and grime. The housing may include a ballast compartment configured to receive a second fluid and the trough may include a heating element configured to heat both the first and second fluid. The trough may also include a sieve configured to remove debris from the receptacle.
