In this video, Dr. Amanda Hedges shows you how to administer liquid medications, supplements and dewormers with a syringe. (Be sure to turn up your sound!)
Related resources you may also be interested in:
British Equine Veterinary Association (BEVA): Don’t Break Your Vet - Worry-free Deworming
McKee-Pownall Equine Services: How To Give Oral Medications