The drawing depicts the most common intramuscular injection points of the horse:

• the hip muscles
• the thigh muscles. Avoid the furrow formed by the junction of the semimembranosis muscle and the semitendenosis muscle.
• the pectoral muscle
• the injection triangle of the neck. Inject in the centre of this triangle. The landmarks for identifying this triangle are
  • in front of the shoulder (scapula)
  • dorsal to (above) the cervical vertebrae and
  • distal to (below) the ligamenta nuchae or
  • a hand's width below the dorsal aspect of the neck.