Hi Pippa, The source of meat meal may well be the same for "natural" foods. In order to be truly safe in what one feeds the dog the food would have to certified organic and slaughtered for human consumption. Even "organic" livestock are euthanised on the farm if they are not fit enough for transportation. Even if one chooses to feed raw natural (BARF) there are likely to be residues of antibiotics and hormone growth drugs in the meat and bones and then there is the pesticide and genetic modified effects on the fruit and veggies. Certified organic is the way to go but it is very expensive.
Rose