title: What has had the most impact in the veterinary world over the past 125 years?
mesh_terms: D000827:Animal Welfare / Q000266:history* / Q000639:trends; D000818:Animals; D049672:History, 19th Century; D049673:History, 20th Century; D049674:History, 21st Century; D014730:Veterinary Medicine / Q000266:history* / Q000639:trends