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 heat cycle can vary dramatically. Dogs go into heat on average twice a year, but some dogs may go into heat three times and many larger breeds only once annually. The cycle lasts an average of 12 to 21 days but can be as short as a few days or last as long as four weeks. A female's first heat cycle will usually occur sometime between 6 months to a year, although it may occur as early as 5 months in smaller breeds and as late as 14 months in larger breeds. Females can get pregnant during the first heat, though it is not advisable.