'The flood of worthless and even harmful dog foods on the marked it deplorable. The dog food industry is too new to have eliminated its undesirables. The cheap price at which many canned dog foods are sold is evidence in itself of poor quality. The cost of the can, the labor of filling it, the cost of transportation and handling cannot be less than six cents. If anything of food vaue for the dog is put into the can, it doesn't retail at this price or near it. The best dog food is, in the long run, the least expensive. Many ailments of dogs are due directly to poor food, many others are due indirectly to the same cause. Beware of the can of dog food that has nothing in it fit for the dog. [494-]

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[-495] A large percentage of the dogs brought to veterinarians for treatment are, unknown to their owners, suffering primarily from nutritional ailments. The domestic dog is restricted greatly in his selection of food. The chance that he will receive a balanced diet when fed table scraps and occasional purchases of meat or meat scrap from the market, is indeed small. Unfortunately the commercial dog food industry is of such recent development that the unworthy manufacturers have not yet been weeded out and unless discrimination is employed, the likelihood of obtaining a suitable commercial food for a dog is not much better than leaving it to chance. Unless the dog owner is willing to confine his purchases of commercial dog food to a few of the well known and thoroughly reliable firms, he should seek the advice of his veterinarian as to what to feed the dog. An improper diet is a direct cause of many ailments of dogs, not only of the digestive system but of the bones, the eyes, the skin and other organs. Further, it lowers their resistance to disease and to parasites, thus increasing the likelihood of illness and lessening the chance of recovery. The desirability of a dog for a pet depends very much upon how it is fed.' (494-495)