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.
My late wife fed the cat on our back deck at about 7 am. Expert: Dr. Peter replied 4 years ago. In response to your question, a cat without any food can go for weeks without dying. Certainly, that will depend on the health status and fat. But, overall they can go for at least 2-3 weeks without any food. Outdoor cats (strays) usually are very good hunters and tend to eat mice, rats, birds, squirrels, etc. I think she will be fine during your week of vacation.