Then checking the insulin / glucose ratio on a blood sample would be a more definitive test for excess insulin. (vetinfo.com)
However, he says, because there are many types of particles, there is no single definitive test of the principle. (sciencemag.org)
It did give an indication to breeders as to which of their younger dogs might then be likely to be affected, but fortunately we now have a much more definitive test. (thehappypuppysite.com)