How Much Will a Female Dog Bleed When She's in Heat?

by Norma Roche Google
    Furniture can be covered to prevent staining when a bitch is on heat.

    Furniture can be covered to prevent staining when a bitch is on heat.

    Janie Airey/Lifesize/Getty Images

    Female dogs have their first estrus cycle -- known as coming on heat or being in season -- at around 6 to 7 months, though it can be as early as 4 months or as late as 2 years in some breeds and individuals. From then on, most bitches come on heat twice a year. During estrus, female dogs have a blood-stained discharge.

    Pro-Estrus Bleeding

    The first stage of estrus is pro-estrus, lasting 4 to 15 days, and a hormone called estrogen is produced causing changes in the bitches' wombs and vaginas in preparation for mating. Blood vessels in their wombs become enlarged, and red blood cells seep out of some vessels causing blood-stained discharges. The amount of discharge varies, with some bitches only spotting, while others bleed heavily. The blood loss can be deceptive, depending how frequently females lick themselves clean. The is followed by estrus proper, lasting 4 to 8 days, when ovulation -- where the eggs are released from the ovaries -- takes place, females become receptive to male dogs and the bloody discharge usually reduces and eventually stops.

    Cleaning and Prevention

    The blood stains on furniture and carpets can be soaked with cold, salted water and washed with biological washing powders to clean them. Dog knickers with sanitary pads can help to prevent staining indoors. They can be bought from pet stores or homemade. Coming on heat can be prevented by spaying female dogs. Consult your veterinarian to discuss spaying or any concerns with estrus.


    • Doglopaedia A Complete Guide To Dog Care; J. M. Evans and Kay White
    • Caring For Your Dog; Dr. Bruce Fogle
    • Veterinary Notes For Dog Owners; Trevor Turner B.Vet. Med., M.R.C.V.S.

    Photo Credits

    • Janie Airey/Lifesize/Getty Images

    About the Author

    Norma Roche has worked as a complementary therapist with people and animals for more than 10 years. A teacher, she creates courses in therapies and related subjects for beginners to professional therapists. Roche received a B.A. in historical studies from Portsmouth University and holds various qualifications in therapies.

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