Female pets that are not spayed will enter a heat cycle and menstruate. Similar to human women, if a pet is not impregnated during her heat cycle, she will shed her uterine lining and bleed. Purchasing pet-specific diapers will help absorb any bodily fluid that your pet may excrete. If a pet refuses to wear the diapers, confine them to a room with an easy-to-clean floor. If you do not want your menstruating dog to become impregnated, prevent them from situations where a male pet may mount them. Male pets can smell a female’s heat cycle and will try everything possible to get to your female pet.
Most dogs menstruate continuously for 21 days, approximately every 6 months. Cats’ cycles last 4 to 10 days but occur more frequently than dogs, about once every 8 to 12 weeks.
If you do not plan on breeding your pet, have them spayed. Spaying female pets prevents numerous health issues including some life-threatening diseases.