90% of laminitis cases are due to an underlying metabolic cause.
These are usually 1 of 2 common metabolic diseases in horses.

PPID or Cushing's is a well-known metabolic disorder in older horses and ponies, however it can occur in younger individuals as well with sometimes vague clinical signs.

Equine Metabolic Syndrome (EMS) is usually associated with obesity and laminitis.

Both conditions can be diagnosed and monitored using blood testing.
It is important that if your horse is currently being treated for Cushing's that they have a 6 monthly blood test to monitor how the disease is being controlled.

See www.talkaboutlaminitis.co.uk for further information.