Feline Megacolon: Welfare Management and Treatment

Key Welfare Considerations

• Megacolon involves irreversible loss of colonic smooth muscle function causing faecal impaction welfare.
• Idiopathic megacolon accounts for the majority of cases — the muscle contractility is permanently damaged.
• Clinical signs include straining to defaecate, complete obstipation, vomiting, lethargy, and weight loss.
• Pelvic canal narrowing from old fractures can cause mechanical welfare obstipation leading to megacolon.
• Obstipated cats present in acute welfare distress — manual evacuation under anaesthesia provides relief.
• Warm water enemas and manual removal of hardened faeces require anaesthesia for welfare and safety.
• Long-term medical management includes lactulose, polyethylene glycol, and cisapride prokinetic therapy.
• High-fibre or low-residue diets are used depending on colonic dysfunction severity for welfare management.
• Psyllium husk supplementation provides additional fibre for welfare in early cases.
• Subtotal colectomy is the definitive surgical welfare treatment for refractory megacolon.
• Post-colectomy diarrhoea is common but temporary — long-term welfare is excellent in most surgical cases.
• Cats typically return to normal quality of life after colectomy — welfare justifies surgical intervention.
• Dehydration exacerbates constipation — water intake maximisation is a welfare priority.
• Wet food diets significantly reduce constipation welfare risk compared to dry food exclusively.
• Regular welfare monitoring including defaecation frequency and effort prevents crisis welfare episodes.