Atrial septal defect [ In Cardioascular and Circulatory ]
Atrial septal defect is a hole in the division between the heart atria. It is an uncommon condition in dogs. Most are not clinically significant, but large defects may cause heart failure, cyanosis, and exercise intolerance.

Babesiosis [ In Protozoal Infections ]
Babesiosis is spread by members of the family Ixodidae, or hard ticks. The two species of the genus Babesia that affect dogs are B. canis and B. gibsoni. Babesiosis can cause hemolytic anemia in dogs

Back pain [ In Skeletal and Muscular Disorders ]
Back pain in dogs, particularly in long-backed breeds, such as Basset Hounds and Dachshunds, is usually caused by intervertebral disk disease. It is caused by degeneration and protrusion of the disk and compression of the spinal cord. It occurs most commonly in the cervical and thoracolumbar regions. Signs include back pain, hind limb weakness, and paralysis.

Bilious vomiting syndrome [ In Gastrointestinal Diseases ]
Bilious vomiting syndrome is vomiting in response to bile-induced inflammation of the stomach. Bile salts interfere with the gastric mucosal barrier, allowing acid to irritate the stomach lining and cause gastritis.

Bladder cancer [ In Cancers ]
Bladder cancer is usually malignant in dogs. The most common type is transitional cell carcinoma.

Bladder stones [ In Urinary and Reproductive Systems ]
Bladder stones or uroliths are common in dogs. The stones form in the urinary bladder in varying size and numbers secondary to infection, dietary influences, and genetics. Types of stones include struvite, calcium oxalate, urate, cystine, calcium phosphate, and silicate. Struvite and calcium oxalate stones are by far the most common.

Blastomycosis [ In Fungal Infections ]
Blastomycosis is a fungal disease caused by Blastomyces dermatitidis that affects both dogs and humans. Dogs are ten times more likely to be infected than humans. The disease in dogs can affect the eyes, brain, lungs, skin, or bones.

Bloat [ In Gastrointestinal Diseases ]
Bloat (also known as gastric torsion or gastric dilatation-volvulus (GDV)) is an emergency condition in dogs, seen most commonly in deep-chested large and giant breed dogs. The disease is characterized by the presence of a large amount of gas in the stomach and twisting of the stomach along its axis. Treatment for shock and then surgery is usually necessary.

Brain tumors [ In Cancers ]
Brain tumors can be either metastatic or primary in dogs. The incidence of primary tumors is 14.5 per 100,000 dogs at risk. Types include meningioma, astrocytoma, oligodendroglioma, and undifferentiated sarcoma.

Brucellosis [ In Bacterial Infections ]
Brucellosis is a sexually transmitted bacterial disease that can cause uveitis, abortion, and orchitis in dogs.

Canine coronavirus [ In Viral Infections ]
Canine coronavirus is a gastrointestinal disease that is usually asymptomatic or with mild clinical signs. The signs are worse in puppies.

Canine distemper [ In Viral Infections ]
Canine distemper is an often fatal infectious disease that mainly has respiratory and neurologic signs.

Canine herpesvirus [ In Viral Infections ]
Canine herpesvirus is an infectious disease that is a common cause of death in puppies less than three weeks old.

Canine influenza [ In Viral Infections ]
Canine influenza is a newly emerging infectious respiratory disease. Up to 80 percent of dogs infected will have symptoms, but the mortality rate is only 5 to 8 percent.

Canine minute virus [ In Viral Infections ]
Canine minute virus is an infectious disease that can cause respiratory and gastrointestinal signs in young puppies.