This would include checking out dog food tests to see which is the best type of food that we can feed to them. With so many different types of dog food out there to choose from, many of them telling you that they are the one that will make your dog the happiest, or the healthiest, of that your dog will have the shiniest coat, it's hard to separate the wheat from the chaff.
The thing that most people don't know about dog foods is that, commercially, there really aren't any dog foods out there that are actually good for your dog. The reason is that the regulations that govern what can be printed on a package of dog food are much more lenient than those that tell us what can be printed on food made for human consumption. Even if the pet food says chemical free, or no chemicals added, that simply means that no chemicals were added to the product after it entered the factory for processing. Before it got there they can basically do anything that they want to it.
Commercial dog food is full of things that can harm your pet over time. Not only is the raw product full of chemicals and byproducts, but it actually contains the remains of euthanized pets from shelters, road kill and diseased animals in most cases. The only way around this sort of thing is to either make your own dog food, or to insure that the dog food you are buying is actually good for your dog.