Dart injection
A Dart injection is used to give a single intramuscular or subcutaneous injection
Subcutaneous injection
A subcutaneous injection is administered as a bolus into the subcutis, the layer of skin directly below the dermis and epidermis, collectively referred to as the...

 to livestock
Livestock refers to one or more domesticated animals raised in an agricultural setting to produce commodities such as food, fiber and labor. The term "livestock" as used in this article does not include poultry or farmed fish; however the inclusion of these, especially poultry, within the meaning...

 without restraining the animal. It can be contrasted with hand injection. http://www.bioone.org/perlserv/?request=get-document&doi=10.1638%2F1042-7260(2002)033%5B0397%3AMKIRRT%5D2.0.CO%3B2
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