You will lose a pound if you burn 3500 more calories than you take in. This is one of the bottom lines in weight loss but whether or not you are actually burning 3500 calories varies from person to person with the same activity.
A dog can survive without eating for 14 days, procided day wouldn't be in good shape and health.
Sharks can survive for up to 6 weeks without any food. However this  time frame has been debated and new studies show that they may only  be able to survive up to 2 weeks wi â¦ thout food.