Vaginal Discharge in Dogs: When You Should Really Begin to Worry?


Discharge from dog’s vulva can be either physiological or pathological. The changing of the fluid’s color to yellow, gray, green or brown, appearance of a pungent odors, appearance of blood or pus in the fluor are sure indications of a problem. In some conditions, though, such discharge will be a norm but in other cases the same symptom may indicate a serious disease.

Physiological Causes

Mucous, clear, odorless discharge is a norm for healthy females in reproductive age. Its appearance is associated with the pre- and postpartum period.

  • yellow discharge from dog's vulvaDischarge from dog’s vulva is considered normal when it appears immediately after mating or in 1-2 days before delivery when the mucoid impaction comes out in the form of a sticky white or gray liquid. If its color is darker and there is an unpleasant smell, the pet must be shown to the veterinarian, as this may indicate the intrauterine death of one of the puppies or other complications of pregnancy. Brown, less often bright red discharge, replaced later by transparent mucous liquid is a sign of menstruation. In dogs, it occurs 1-2 times a year and lasts 20-22 days.
  • Brown postpartum discharge from a dog’s vulva continues up to 2-3 weeks, gradually changing its color from brown to white or slightly pinkish. Its duration depends on the number of puppies in the litter. In the first 2-3 days, the discharge may acquire a greenish tint due to remains of placenta, and this would not be considered a pathology. Discharges of black or brown color, odorless and lasting no more than 3 days, also referred to the normal postpartum reaction. Bright red discharge appears after within 8 hours after parturition when the mother had to be administered Oxytocin. But it can also mean the opening of bleeding in the uterus, especially if the hue of the discharge changes to scarlet. If a watery liquid with an unpleasant odor flows from the pudendum, this may indicate an incomplete or delayed placental delivery. If you do not take rapid action, this will lead to suppuration and intoxication of the animal’s body. The decomposition of placental tissue will cause fever, weakness, lack of appetite in the dog.
  • Discharge coming from dog’s vulva immediately after mating in form of whitish liquid of thick consistency is a natural reaction to seminal fluid and lasts several days. A slightly pinkish shade is also characteristic. If conception has occurred, by the end of the second week in the aftermath of the mating mucoid discharge appears, indicating that the cervix has ​​closed.

Pathological Causes

These may include:

  1. brown discharge from dog's vulvaFalse pregnancy. If conception has not occur, but the female’s mammary glands are swelled and the characteristic discharge from the genital organ has began, a hormonal disruption can be suspected. Such a condition usually develops in 5-8 weeks after estrus.
  2. Vaginitis. The inflammatory process in the vagina causes an increased secretion of mucus. This is usually a white discharge from the loop in the dog, accompanied by odor and itching. In animals before reproductive age, the condition can be caused by hormonal disorders and is manifested by yellowish secretions.
  3. Pyometra. Purulent inflammation of the uterus can be of 2 forms: with the first form pus is excreted through the genital tract, with the second one, it is retained in the uterus, intoxicating the body or even leading to rupture of the organ, which is fatal.
  4. Endometritis. Inflammation of the mucous layer in uterus often develops due to an imbalance of the endocrine profile, as a result the walls of the organ thicken and more mucus than usual is produced. When infected a purulent discharge may appear as well as refusal to food, fever. The disease in the chronic stage t can lead to infertility.
  5. Neoplasm. Venereal sarcoma is the most common form of cancer with such manifestations in dogs.

Concomitant Symptoms

In addition to mucoid secretions, a dog may show the following concomitant symptoms:

  • bloody discharge from dog's vulvaThe animal constantly licks the crotch or rubs it on the floor.
  • The fever may rise, appetite disappears.
  • A foul odor comes from the animal.
  • It becomes restless or lethargic.

With inflammation in the uterus, constant thirst appears with noticeable coordination disorder. The dog’s vulva swells up and become black, bloody vaginal discharge may also be present. Venereal sarcoma affects the mucous membranes of the reproductive organs, but can spread to the nasopharynx, oral cavity, eyes. In this malignant disease, blood and pus are released from the pudendum, urination becomes more frequent, and lumpy growths of brown or red color appear on the external genital organs.

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