Whenever the label permits, injections should be given subcutaneously. However, some products are labeled for intramuscular use only and should be given in the neck (this includes estrous synchronization products). Cattle may sometimes flinch when giving intramuscular injections which can cause the needle to bend or break. To help prevent cattle from moving make sure they are properly restrained in a squeeze chute. It may also help to touch the neck or slightly rub the back of your hand on the neck prior to an intramuscular injection to reduce how much cattle react when giving an intramuscular injection.
