Again, some grains contain the precursors that dogs need to synthesize taurine on their own. So, yes, they can be very important. All the ingredients need to work together to make a complete nutrient package.
And, again, and most important, most of the dogs being diagnosed are NOT taurine deficient. So, your continued recommendation of feeding foods high in meat content is not necessarily a fix.
Any company can choose to part with some of their profits and hire a team of experts, do some research and controlled feed trials. There is no one stopping them.
Veterinary nutritionists have years of education. They should be shown some respect.
