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.
The dog will then continue to go into heat approximately every 6 months or twice per year. Most female dogs are in heat for 18 days, although male dogs are only interested in the female dog for about half of this time. It is recommended that if the owner does not intend to breed the dog, then she should be spayed either before or after her first heat cycle.