Letter: Considerations in spaying.
D000367:Age Factors; D000818:Animals; D001290:Attitude; D001522:Behavior, Animal; D002369:Castration / Q000662:veterinary*; D004285:Dogs; D004971:Estrus; D005260:Female; D007044:Hysterectomy / Q000662:veterinary*; D011247:Pregnancy