Too little fiber in the diet, blocked anal sacs, excessive grooming, eating bones or string and an enlarged prostate gland cause constipation in pets. A doctor's diagnosis of why the pet is constipated determines the course of treatment.
Additional causes of constipation are a tumor which obstructs the intestines, injury to the pelvis, neurological disorders and orthopedic problems that make it difficult for the animal to get in the correct position to defecate. Dogs that eat toys, plants or rocks are susceptible to constipation as well.
Common treatments for constipation in pets are stool softeners, increasing fiber, medication prescribed by a veterinarian, enema and increasing water intake and exercise. Without treatment, the pet can experience obstipation, which means he can't empty his bowels by himself.