No family wants to cope with an unwanted litter. No family wants to cope with an unwanted litter. Spaying prevents your pet from giving birth to unwanted kittens or puppies. Males neutered early in life are less aggressive toward other males and are not distracted by females in heat. A neutered male will be less tempted to leave your property and cross dangerous streets searching for a mate.
Neutered males are also less likely to mark territory with their urine.
Spaying your female pet eliminates the problem of stray males camping in your yard and decreases her desire to roam and to breed. My pet will get fat and lazy. Neutering or spaying may diminish the pet's natural tendency to wander but it will not affect the overall activity level. When pets do gain weight after being altered it is usually because of a combination of overfeeding and underactivity. Just remember to adjust feeding to your pet's activity level.