So how can you tell if a pre-mix is used? If there's a long list of minerals at the end of the ingredients list?
Here's the article I think Kipawa was referring to:
"There is something inherently wrong with most processed foods that pet owners are unaware of. The heating and processing that these foods undergo create a fundamental change that could have dangerous ramifications – it renders the food essentially dead. What goes into the good is not what comes out once it is heated, sterilized, irradiated and extruded and nearly all dog foods will not meet AAFCO standards once they are heated. As a consequence, the vitamins and minerals must be added back in for the food to pass AAFCO requirements."
It's the reason I switched to NRG in the first place. Gently dehydrated means the food retains those important nutrients, so no pre mix.