Can geldings have hormone imbalance problems?

Yes, geldings can have hormone imbalances, although they are less common than in stallions or mares. The most common hormone imbalance in geldings is equine pituitary pars intermedia dysfunction (PPID), also known as Cushing's disease. PPID is caused by a tumor on the pituitary gland that results in the overproduction of hormones, including ACTH, which in turn stimulates the adrenal glands to produce excessive amounts of cortisol. Symptoms of PPID can include weight gain, a long, thick hair coat that doesn't shed properly, laminitis, and muscle weakness. Treatment for PPID typically involves medication to reduce the production of ACTH and control the symptoms.