Calories certainly aren't the only factor. If you feed animals the same exact diet and they have similar exercise habits and their excrement has the same calori

Calories certainly aren't the only factor. If you feed animals the same exact diet and they have similar exercise habits and their excrement has the same caloric value, why does one get obese while the other doesn't? Genetics, epigenetics and gut biome likely all contribute to the problem. https://nautil.us/what-if-obesity-is-nobodys-fault-234639/ https://nautil.us/what-if-obesity-is-nobodys-fault-234639/