what is metabolizable energy
0. Metabolizable energy (ME) is defined as the amount of energy available from pet food once the energy lost in the feces, urine, and combustible gases has been subtracted. Essentially, ME is the energy left for your pet's body to use once all digestion is complete.. Metabolizable energy (ME) is defined as the amount of energy available from pet food once the energy lost in the feces, urine, and combustible gases has been subtracted. Essentially, ME is the energy left for your pet's body to use once all digestion is complete.