Mucus in a Dog's Urine

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Healthy dogs have transparent or slightly yellow urine without any traces of solid material, like mucus. Mucus in dog urine is a sign of an infection or something else that is making your dog sick. With either blood or mucus in dog urine, the cause can be something serious or something minor. Either way, it needs investigating.


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Causes of mucus in dog urine

According to Dog Time, there are quite a few reasons you might see mucus in dog urine. Mucus is a sign of inflammation, which can be caused by several different things, including eating food that upset your dog's stomach; a bacterial, viral, or parasitic infection; allergies; or inflammatory bowel disease or other immune disorders.


More seriously, potentially life-threatening possibilities include digestive tract blockage from eating something that is a nonfood item or nondigestible, cancerous tumors or benign polyps, an injury to the bowels or other parts of the digestive tract, or canine colitis, which is an inflammation of the colon in dogs.


Dog bladder infection symptoms

How do you know if your dog has a bladder infection or a urinary tract infection? Urinary tract infections are common in dogs and are just as uncomfortable. Dog bladder infection symptoms are easy to spot. While you might not see a jellylike substance in dog urine, the urine may be cloudy. Your dog may try to urinate frequently but with very little coming out.


It may be obvious that trying to urinate is painful. Another obvious sign is frequently licking the genitals. If the bacteria that causes UTIs move farther up the urinary tract, they may infect the bladder. If that happens, that's a much more serious situation. Usually, vets prescribe antibiotics for UTIs in dogs, and it clears up dog bladder infection symptoms as long as it is spotted early.


Vaginitis in dogs

A female dog can experience vaginitis, which is the medical term referring to inflammation of the vagina or vestibule, according to VCA Hospitals. Common signs of vaginitis include urinating more often, licking the vaginal area, scooting or rubbing the vaginal area on grass or carpet, and thick dog pee caused by mucus or other discharge. Vaginitis can appear in any female dog at any age, whether spayed or not.


Pyometra in female dogs

A bacterial infection of the uterus in female dogs is another cause of mucus in dog urine, says Pet Assure. This is called pyometra, and it is a life-threatening condition. Pyometra most commonly occurs in older, nonspayed females following a heat cycle. Following a heat cycle, the uterine walls thicken. As they thicken, it can cause the uterus to not squeeze together to push out fluids, which causes an infection.


Pyometra can manifest in different ways depending on whether the cervix (the opening to the uterus) is open or closed. If the cervix is open, you will see a foul-smelling discharge with mucus. The infection is leaving the body. In a closed-cervix situation, the infection cannot leave the body, so it builds up and then leaks into the blood stream and abdomen, leading to shock and death.


Bladder stones in dogs

If you're sure that you are seeing thick dog pee and not discharge from a female dog in heat, it is something to check out with your vet. Once a urinalysis is done, your vet will know if the cause is an infection and if that cause is fungal or bacterial. Other tests may need to be done to rule out other causes.

VCA Hospitals warns that bladder stones can form due to infections, a dietary problem, or a problem with the body's metabolism. If the urine becomes saturated with a compound that is known to form crystals in urine due to whatever the cause, the urine eventually becomes saturated and starts to form crystals. The sharp crystals irritate the bladder lining, which causes mucus production. The crystals and the mucus combine to form larger, harder stones.

Whatever the cause of mucus in dog urine, proper medical treatment is the best course of action because an untreated infection can lead to even worse problems.

Always check with your veterinarian before changing your pet’s diet, medication, or physical activity routines. This information is not a substitute for a vet’s opinion.