Field testing is usualy done by testing a product out in public NOT in a lab. It hurts me that people are saying that Galaxy D most likely will NOT protect our ferrets because it was not FIELD tested. It has been FIELD tested for ferrets just not lab tested as everyone has been claiming. It HAS been LAB tested on dogs for the guarding against canine distemper and has been proven effective as well as bieing short term lab tested in ferrets and been proven effective. Canine Distemper IS what ferrets get. I have done FIELD testing with my own product in PUBLIC and found that it does do what I said it will do and because of the PUBLIC'S responce I continue to make & sell my product. Galaxy D has been FIELD tested by Ferret Shelters/Rescues, Vets and private ferret owners and HAS been found to be effective in guarding our furkids against the canine distemper virus. If it weren't we would not still be using it after all these years. A long time ago when it was first used in ferrets it had given the virus to some of the ferrets BECAUSE it had been a modified live vaccine. Because of the results, it was then Re-formulated into a KILLED vaccine, problem solved. It is in my opinion that is shared with other ferret rescues an vets that use Galaxy D that it is a PROVEN canine distemper vaccine in guarding our ferrets against this virus because WE have tested it by using it. [DV] [Posted in FML issue 5158]