The VA isn’t a drug company or medical device manufacture, any treatments used at the VA should previously had it’s test results verified by the FDA. The onus for verification should be on the drug or medical device creator while being validated by outside agencies. Animal testing on mice and rats are the most common animals used in laboratory testing. Using larger animals should absolutely be limited to those extreme cases where a closer human analog is required. I’d love to eliminate all animal testing, unfortunately we aren’t there yet.