Spaying a dog or cat eliminates her heat cycle. Estrus lasts an average of six to 12 days, often twice a year, in dogs and an average of six to seven days, three or more times a year, in cats. Females in heat can cry incessantly, show nervous behavior, and attract unwanted male animals. Spaying and neutering makes pets less likely to bite. Unsterilized animals often exhibit more behavior and temperament problems than do those who have been spayed or neutered.
Neutering makes pets less likely to roam the neighborhood, run away, or get into fights.
Irresponsible breeding contributes to the problem of dog bites and attacks. Animal shelters are overburdened with surplus animals. Stray pets and homeless animals get into trash containers, defecate in public areas or on private lawns, and frighten or anger people who have no understanding of their misery or needs. Some stray animals also scare away or kill birds and wildlife. My pet will get fat and lazy.