Dog in Heat? How to Clean Blood Spots Off Carpet, Bedding and Furniture

When an unspayed female dog comes into heat, she has a bloody discharge for part of the cycle. Some dogs leave barely a trace; others leave spots on every bed, sofa and rug they lie on. The good news is that fresh blood is one of the easier stains to remove if you treat it right: cold water, quickly, and no heat until it is gone. This guide covers spots on carpet, bedding, upholstery and hard floors, plus how to keep the mess down for the few weeks it lasts.

The stain steps follow blood stain advice from Mississippi State University Extension, and the heat cycle background comes from the Pet Parents guide to female dogs in heat, both in our own words and linked under further reading. If the bleeding seems heavy, goes on much longer than usual, smells bad, or your dog seems unwell, call your veterinarian.

The golden rule: cold water, never hot

Blood is a protein stain. Hot water, a hot dryer or a steam cleaner can set it into the fibers so it never fully comes out. Use cold water for every step until the stain is gone, and check before anything goes in the dryer.

Bedding, blankets and washable covers

Rinse the spot from the back under cold running water, to push the blood out the way it came in.
Soak in cold water for about 30 minutes. Mississippi State Extension gives this as the first step for fresh blood.
Rub a little liquid laundry detergent into what is left, rinse, then wash as normal in cold or cool water.
Check before drying. If a mark is still there, soak again, this time with an enzyme laundry pre soak or an enzyme cleaner made for pet stains, then rewash. Bleach is a last step and only on fabric that is labelled bleach safe.
Air dry or use the dryer only once the stain is gone.

Carpet and rugs

Blot, do not rub. Press a clean white cloth or paper towel on the spot to lift as much as you can.
Dampen with cold water and blot again. Keep the area damp, not soaked, so the blood does not spread into the backing.
Apply an enzyme cleaner made for pet stains, following the label for how long to leave it. Enzymes break down the protein in blood as well as in urine.
Blot with cold water to rinse, then press dry with a towel.
Dried spots: loosen them with cold water first, let the enzyme cleaner sit a little longer, and repeat if needed. Do not use a hot steam cleaner on blood.

For wool or natural fiber rugs, test in a hidden spot first and see pet stains on area rugs, wool and jute.

Sofas and upholstery

Check the cleaning code on the furniture label before you use any liquid. Water based cleaning is fine on W and WS codes; S means solvent only, and X means vacuum only. For water safe fabric, blot with cold water, apply a small amount of enzyme cleaner on a cloth rather than spraying, and blot dry. Do not over wet the cushion. See how to clean pet stains from a couch for the full code guide. Washable cushion covers can follow the bedding steps above, if the label allows.

Hard floors

Wipe spots up with a paper towel and cold water, then clean with your usual floor cleaner. On tile, check the grout, which can soak up a pink tint; see pet urine and vomit on tile and grout.

Keeping the mess down during her heat

A washable dog diaper or heat pants catch most of it. Change them often and keep a few spare. See how to wash dog diapers and belly bands.
Cover her favorite spots with old towels, a washable throw or a waterproof blanket, and wash them every few days.
Close doors to bedrooms and rooms with pale carpet for a couple of weeks.
Put washable covers on her own bed and keep a spare so one is always clean. See how to clean a dog bed.
Spot clean daily while stains are fresh. A daily cold rinse is much easier than tackling a week of dried spots.

She will also lick herself clean more than usual, which is normal. Keep her safely away from male dogs throughout the cycle.

Keep cleanup supplies ready

Our Pet Cleanup Kit is made for pet stains and odors on carpets and fabrics. Keep it with a few clean white cloths and old towels while your dog is in heat.

Frequently asked questions

How do I get dog period blood out of carpet?

Blot, dampen with cold water and blot again, then use an enzyme cleaner made for pet stains and rinse by blotting with cold water. Never use hot water or a steam cleaner on blood.

Does hot water remove blood stains?

No. Heat can set blood into fabric and carpet. Use cold water until the stain is completely gone.

Can I use hydrogen peroxide on dog blood stains?

It can bleach many fabrics and carpets, so test it in a hidden spot first or stick to cold water and an enzyme cleaner. Never mix it with other cleaners.

How long will my dog bleed when she is in heat?

It varies from dog to dog and cycle to cycle, usually around a week or two. If it goes on much longer, is very heavy or smells bad, ask your veterinarian.