By products can be any thing from ground up innards to road kill to other euthanized animals that no one loved or wanted.
Shelters do not turn over dogs and cats to the dog food companies. They are cremated and the ashes mixed in with the landscaping around the shelter.
I do agree that some of the most popular brands of dog food are some of the worst. If you want to feed your pets "Old Roy" from Walmart, all it is doing is filling your dogs stomach. The brand has almost no nutritional value.
Science Diet used to be good until about 1988. Then they decided to try to cheapen it. Finally in 2007 they started to use Chinese wheat gluten and we all know what happened to that, dogs started to die from the melamime in the food. They got caught with their pants down.
My vet said the best thing you can do for your pet is to research the ingredients of dog food, and then buy what you think is the best for your dog. Then all you can do is hope for the best. Another little known fact. Most vets have books that outline the ingredients of most dog food brands.
There are websites that will rank dog foods, but beware if you see a lot of advertising on that website, there is a good chance that the number one food on the list will be the food that the company sponsoring the website sells.
We feed our dogs Nature's Recipe. It's not number one, but we feel safe with it.
And remember, the USDA has not yet repealed their warnings about pet food. So buyer beware.
As part owner of the
www.blacklabrador.com website, we have a special section that is devoted to dog foods. If you want to have a look the link leads to the site. It will give you some insight as to what people generally think of different brands.