Your dog may or may not exhibit symptoms beyond the enlargement of the prostate gland itself, and it may or may not feel pain as a result of the enlargement. Potential additional symptoms include:
- Pain during and trouble urinating
- Pain during and trouble defecating
- Pain during and trouble walking, coupled with a hindered gait (short steps, stiff rear legs)
- Constipation
- Abnormal stools
- Pain, ranging from mild discomfort to severe pain
Types
Benign Prostatic Hyperplasia - Benign Prostatic Hyperplasia, or BPH, is the most common cause of prostate enlargement. It occurs as a natural part of aging in the majority of unneutered male dogs, but does not occur in neutered male dogs. As the dog ages, the gland goes into hypertrophy, which means that the number and size of the cells in the prostate gland increase. As a result of BPH, benign cysts may develop. This condition puts pressure on surrounding tissue and may cause discomfort.
Bacterial Infection - The second most common cause of prostate enlargement, bacteria may enter the prostate through the blood system or urinary tract and cause an infection. Bacterial infections may be acute or chronic and may present as abscesses, which are pockets of pus that form within the gland. Along with the typical symptoms of an enlarged prostate, those caused by bacterial infection are likely to also cause an elevated fever.
Cancer - Prostatic cancer is rare in dogs, accounting for less than 10% of enlarged prostate cases; however, they are difficult to treat, are typically malignant and can be life-threatening. Prostatic cancers often metastasize into the liver, lungs, kidneys, lymph nodes, spine, and pelvic bones. Prostate enlargement may also occur as the result of another cancer metastasizing, often transitional cell carcinoma (cancer of the urinary system).