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.
Fish can actually go for about 3 weeks without food so I wouldn't worry. They are a lot hardier than we think! I see mine all at the top waiting to be fed and I swear they give me the look-ya know the big puppy dog eyed look where your heart just mealts and you swear they are starving.... But they're not.ish can actually go for about 3 weeks without food so I wouldn't worry. They are a lot hardier than we think! I see mine all at the top waiting to be fed and I swear they give me the look-ya know the big puppy dog eyed look where your heart just mealts and you swear they are starving.... But they're not.