How can I treat my old horse's swollen fetlock?

To treat your old horse's swollen fetlock, start by resting the affected leg and applying cold therapy, such as ice packs, for 15-20 minutes to reduce swelling. You can also wrap the fetlock with a supportive bandage to provide stability. If the swelling persists or is accompanied by pain, consult your veterinarian for a proper diagnosis and treatment plan, which may include anti-inflammatory medications or further diagnostic imaging. Regular monitoring and adjusting the horse's workload may also help prevent future issues.