Veterinary teams need CPR training for animals just like we need training on how to perform CPR on a human. RECOVER, which stands for the Reassessment Campaign on Veterinary Resuscitation, was developed by a group of emergency and critical care specialists from multiple veterinary schools across the globe based on evidence from scientific literature. Published in the Journal of Veterinary Emergency and Critical Care < link > these guidelines were apparently an industry first.
Source: Tufts Catnip, December 2018. Link. Lots of opinions on how to do it correctly, but only one is based on actual evidence.