Constipation is a common feline problem and is defined as infrequent or difficult evacuation of feces.  Acute constipation due to a one-time pelvic trauma or soft tissue pain can be handled best by resolving the underlying problem.

Chronic constipation often is not a dysfunction of the colon but a result of other factors:

Medical issues: (other than colon)

• Dehydration is the most common cause
  • Increased losses ‑ chronic renal disease, vomiting, diarrhea, or polyuria from diuretics
  • Decreased intake ‑ lack of availability of water, nausea, or oral diseases
• Orthopedic issues ‑ arthritis (which can also limit water availability) or narrowed pelvic canal from healed trauma
• Neurologic disorders ‑ as chronic disc disease or other diseases causing ataxia
• Excessive fecal matter (bulk) secondary to high fiber diet

Genetic:

• Manx cats with sacral spinal cord deformities

Medications:

• Opiates
• Anticholinergics
• Sucralfate