Needle Size Matters

Needle Size Matters

Dr. Ken McMillan
DTN

Concerning needle size, I recommend the smallest gauge needle possible. Large needles make bigger holes, are more painful and cause more damage, and product can leak back out. I use 20-gauge, 3/4-inch needles for SQ vaccinations on calves. With adult cattle, or when administering thick medications, I use a 16-gauge with a 3/4-inch needle. I only use needles once.

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