HORSES AND DONKEYS AND MULES · OWNER EDUCATION
Pituitary Pars Intermedia Dysfunction (PPID)
PPID is a common endocrine disorder of older equines that may affect coat, muscle, immunity and laminitis risk.
THE SHORT VERSION
Understanding supports better veterinary conversations.
PPID is a common endocrine disorder of older equines that may affect coat, muscle, immunity and laminitis risk. Similar signs can have very different causes, so the animal's species, husbandry, examination findings and diagnostic results all matter.
What is this condition?
PPID is a common endocrine disorder of older equines that may affect coat, muscle, immunity and laminitis risk. Similar signs can have very different causes, so the animal's species, husbandry, examination findings and diagnostic results all matter.
Which animals can be affected?
Risk factors, examination findings and management can differ between species and individual patients.
Why can it happen?
- Age-related dysfunction in the pituitary gland.
- Individual risk and seasonal hormone changes affect testing.
What might an owner notice?
- Delayed shedding or long curly coat, muscle loss and abnormal fat distribution.
- Laminitis, increased drinking, recurrent infection or reduced energy.
How is the problem investigated?
- History and examination with endocrine testing interpreted for season and clinical context.
- Assessment for insulin dysregulation and laminitis risk.
What might treatment involve?
- Veterinarian-prescribed medication with nutrition, hoof and dental management.
- Follow-up testing and dose adjustment based on response.
This is an overview, not a prescription or a recommendation for a specific individual animal.
What can owners do at home?
- Record appetite, water intake, waste output, activity, breathing and body weight when it is safe to do so.
- Photograph the enclosure, food labels or flock environment and bring a concise timeline to the veterinary visit.
- Follow the veterinarian's exact instructions for medication, feeding, isolation, rechecks and environmental correction.
Avoid actions that could make care less safe.
- Do not give human medication, leftover antibiotics, livestock medication or another animal's treatment without veterinary direction.
- Do not force-feed an animal that is struggling to breathe, cannot swallow, is severely weak or may have an obstruction.
- Do not delay care when appetite, breathing, urination, movement or responsiveness changes rapidly.
What can the longer-term outlook involve?
The outlook varies with the cause, severity, how quickly care begins and whether the animal's environment or nutrition can be corrected.
Can risk be reduced?
- Provide species-appropriate nutrition, housing, sanitation and preventive veterinary care.
- Learn the individual's normal appetite, behavior, body condition and waste pattern so change is recognized early.
When should you arrange care?
- Contact a veterinarian promptly for delayed shedding or long curly coat, muscle loss and abnormal fat distribution. or laminitis, increased drinking, recurrent infection or reduced energy..
- Arrange reassessment if signs recur, treatment is not working or another animal becomes affected.
Seek emergency veterinary care if you notice:
SEEK EMERGENCY VETERINARY CARE- Acute laminitis, inability to walk, collapse or severe infection.
Sources behind this guide
VeterinaryPartner — client education from the Veterinary Information NetworkPrimary veterinary or veterinary-university guidance ↗American Association of Equine Practitioners: horse-owner resourcesPrimary veterinary or veterinary-university guidance ↗Content last reviewed: September 17, 2026. Review status: veterinary-informed; independent veterinarian review not yet completed.