Spaying a dog or cat eliminates her heat cycle. Estrus lasts an average of six to twelve days, after 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.
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