A pound of fat contains roughly 3,500 calories, so a 500-calorie-a-day deficit will cause you to lose about 1 pound each week. You can achieve this by eating 250 fewer calories than usual -- provided your weight is steady on your current diet -- while burning about 250 extra calories per day with cardio.
The heat cycle of the female dog has three parts and lasts about 3 weeks. The first part lasts anywhere from 3-14 days during which a bloody discharge and swelling of the vaginal area are usually seen. Next the dog will become receptive to being bred and actively may seek out a male dog.
If you have a female puppy, you'll need to be prepared for her estrus cycle. It is similar to a woman's menstrual cycle except that it only happens twice a year. She can go in heat from as early as 6 months, so watch out for the signs. Your dog can come into her first heat any time between 6 and 24 months. According to Webvet.com, small dogs come into heat sooner than larger breeds. Typically she will have two estrus cycles, or heats, a year, and each one lasts for between 18 to 24 days. She is likely to show signs that her heat is about to start by changes in her behavior. You could compare this with the kind of emotional ups and downs women go through monthly just before menstruation.