Depending on the size of the animal, viscosity of the product and administration protocols, a variety of needles might be needed. Veterinarians at Kansas State University’s Beef Cattle Institute share guidelines to help decide. Needle diameter, or gauge, varies depending on two factors:
- the size of the animal
- viscosity of the product
Source: Drovers, September 2, 2022. Link. More needle information and suggestions can be found in the Beef Quality Assurance manual.