Described is a consumption monitoring device for monitoring the amount of consumables consumed by an animal during a monitoring period. More specifically, the consumption monitoring device measures the weight of the consumables, which are contained within a receptacle, and detects any change in the weight, such as when additional consumables are placed within the receptacle or when the animal consumes all or some of the consumables. The device calculates various values based on these changes in weight, at least one of which indicates the amount of consumables consumed by the animal. The device displays this calculated value such that the user is informed of the amount of consumables consumed by the animal within the monitoring period. This information assists the user in maintaining the animal on a desired feeding program.