Horse Cushings Disease: Welfare Management

Pituitary pars intermedia dysfunction (PPID or Cushings) affects elderly horses causing significant welfare compromise. Early detection and treatment dramatically improve quality of life.

Key Facts

PPID affects an estimated 15-30% of horses over 15 years of age making it the most common endocrine disorder in older horses
It arises from dysfunction of the intermediate lobe of the pituitary gland causing excess ACTH secretion
The classic curly hypertrichosis coat is a late-stage sign with subtler behavioral and physical changes appearing earlier
Insulin dysregulation associated with PPID significantly increases laminitis risk causing chronic hoof pain
Pergolide mesylate (Prascend) provides effective medical management that dramatically improves welfare outcomes
Early diagnosis using basal ACTH measurement or TRH stimulation test enables treatment before advanced signs
Seasonal ACTH elevation in autumn can cause false positive tests requiring awareness of seasonal reference ranges
Regular dental care, parasite management, and nutritional support for muscle loss are welfare-critical in PPID horses

Welfare Considerations

PPID in horses causes chronic welfare compromise through multiple simultaneous mechanisms: the pain of laminitis, the discomfort of abnormal coat retention causing overheating, increased infection susceptibility, and muscle wasting that reduces mobility. The welfare tragedy of undertreated PPID is that effective medical treatment exists and substantially reverses the welfare impacts of the disease when started early. Annual ACTH screening for horses over 15 years enables diagnosis before laminitis episodes that cause lasting hoof damage. Treating PPID is one of the highest welfare-impact veterinary interventions available for elderly horses.

What You Can Do

Arrange annual ACTH testing for horses over 15 years to enable early PPID diagnosis
Learn to recognize early PPID signs including subtle coat changes, muscle wasting, and increased water intake
Begin pergolide treatment promptly when PPID is diagnosed rather than waiting for advanced signs
Manage laminitis risk in PPID horses through dietary management and regular farriery
Ensure comprehensive supportive care including dental health, parasite management, and winter blanketing for PPID horses
Share information about early PPID detection with other horse owners to promote proactive screening