Fat pets are usually overfed and do not get enough exercise. My pet's behavior will change. Your pet's behavior will change for the better. It will be less likely to roam and fight with other animals. Every animal in a litter is unique.
Most animals give birth in the middle of the night in a place of their choosing.
A love of life and living things should not be taught at the expense of innocent animals. For every animal you place, another dies somewhere else, unwanted and abandoned. Also, the cost of responsibly raising a litter, food, vaccination, etc., will consume most of the profits. My pet should be spayed after her first heat or litter. Spaying your pet before her first heat greatly reduces the chance of her developing many forms of cancer.