Veterinary Vertex
Veterinary Vertex
AVMA Journals
Does Changing the Needle Matter? Evidence from a Canine Vaccination Trial
24 minutes Posted Jan 17, 2026 at 6:00 am.
Welcome And Study Overview
Why Needle Replacement Became A Research Question
Prior Evidence On Needle Sharpness
Study Design And Blinding
Key Findings: No Clinical Difference
When Changing Needles Still Makes Sense
Human Vaccine Practices And Industry Narratives
Teaching Critical Appraisal And Challenging Dogma
Unexpected Signal: Rabies Given Second
Measurement Hurdles And Better Tools
Policy Impact And Shelter Guidelines
Habits To Retire And Behavior Change
Closing And Reader Action
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Show notes
Send us Fan Mail What if one of the most common vaccine rituals in small animal practice doesn’t help patients at all? We sit down with researchers Jane Sagaser and Dr. Rachael Kreisler to unpack a randomized clinical trial that tested whether replacing the needle after drawing up a canine subcutaneous vaccine improves comfort or outcomes. The result is a clear, practice-changing insight: no clinical benefit for dogs, and no reliable advantage detected by blinded injectors. Together we explo...