One of the things dangerous, in the long run, both for dogs and cats, is most of the kinds of dog/cat food advertised and sold by most of the most popular producers. Almost anything you buy anywhere except veterinary drugstores can cause serious kidney and liver disorders, because of the aromatizers and such added to make the food more appealing to animals. That`s why pets don`t really like food recommended by vets. You can`t explain to your pet it`s healthy; the only thing you can do is "starve" your animal for some time so that it stars eating healthy food. Of course, the results of eating Tasty Things are only seen after some years, not at once. But when they are seen it`s not a pleasant view... and sometimes it is too late to help...