Dog food and the pet deaths

I have a cousin that lost her little dog because of Hill's Science Diet.  She took the vet's word that it was good food and did not do any research on it.  Hill's along with Blue Buffalo and a host of others is made by a third party.  Hill's and Blue Buffalo are marketing companies.  They do not manufacture their food so there is no quality control.  the way it was explained to me by someone from A&M Vet school, is that the marketing company goes to the manufacturer and tells them what ingredients they want in the food and what to put on the label.  It is up to the manufacturer to either follow those instructions or not and they can add anything they want and not have to add it to the label.  So the marketing company has no idea what is really in that pet food.  Remember the problem with the melimine in the food?  That company, Menu foods, made dog food for around 9 companies.  So all those companies were involved in that mess.  And there is a catch 22 when they get caught.  Well, we didn't make the food, so this is not on us.  It is on the manufacturer.  The manufacturer says it  is on the suppliers because we bought in good faith.  People, research your pet food.  It does not take a rocket scientist to do that.  Save your pet's life by just using google.  And never, ever ask a vet to recommend a pet food.  They will recommend the ones that they are paid to recommend.  That's why all the vets push Hill's science diet.  Look at the back of the sack.  If it does not say "manufactured by company name" then it is made by a third and 4 party.  Companies that manufacture their own food state that on the sack.  Manufactured by will definitely be on there.  And you can always make your own.