No need to cut. Mammals eat themselves at a cellular level automatically that way, if access to water (snow) but no food for far too many months. The mammal burns fat first, then internal fat, also eating muscle proteins, and pissing away minerals from bones to maintain nervous system, slowly, week, by week. The last six things not "eaten" by a animal starved to death in a cage and only given mineral water and vitamins are 1 : brain 2 : heart and lungs 3 : eyes 4 : skin 5 : PENIS AND TESTICLES!!! 6 : portions , minor, of most all organs, yes even the stomach is partially "eaten" and loses mass. before the mammal "eats" any of the last six things, the brain is too fatigued and deep sleep/coma takes over, then death but you asked "I wonder how long" : between 46 and 73 days for humans, 10 months for an Alaskan Bear In the 1981 hunger strike by political prisoners against the British presence in Northeast Ireland indicate that 10 individuals died after periods of between 46 and 73 days without food, but they were not consuming minerals and vitamins and were mentally TRYING to die to make a point. **DO NOT STARVE, shoot and eat jabbed-leftists, or hijack their food supplies, gathering weapons prior.** EAT THE JABBED, they taste just like pork, when grilled.