Warren Dotz collects the stuff most people treat like garbage. In years past, he’s gravitated to the noisy graphics of firecracker wrappers printed in places as far-flung as Macau and Manila, as well as the vividly illustrated, deity-drenched matchbox covers of India. These paper products, which normally make a one-way trip to the rubbish bin after their contents have been set aflame, are then meticulously cataloged and organized into handsome little books, transforming trash into art.

“Dogs were fed kitchen scraps or ox-foot stew.”

Recently, Dotz tackled one of the most routinely discarded disposables, pet-food labels, particularly those from the 1950s, ’60s, and ’70s. Titled “Cat Food for Thought” and “Dog Food for Thought” and published by Insight Editions, each 128-page volume contains 60 reproductions of pet-food labels on cans, boxes, and bags (the cat book also contains a number of sensational labels for cat litter and catnip). Each label is then paired with a saying, proverb, or quote about cats or dogs that relates to its imagery and text.

“I’ve always been interested in art and design,” says Dotz, who is currently putting the finishing touches on a sequel to his “Meet Mr. Product” book from 2003. “The inspiration for the pet-food-label art collection is a cat-food label called Sassy, which I found at an online auction site. I just thought it was one of the most fantastic labels I’d ever seen.”

Sassy is a green-eyed, ginger-haired feline, who wears a blue bow around her neck and whose 15 1/2 ounces of advertised contents promise only “CAT FOOD,” the composition of which is probably best left unsaid. Sassy eventually led Dotz to the acquisition of four lots of pet-food labels, which he won two years ago in an auction at eBay. “There were literally hundreds and hundreds of labels in these four lots,” Dotz says of his biggest pet-food-label score. “And there was almost no competition. There are dealers who sell fruit-crate labels and sometimes these kinds of labels too, so I thought they might have been interested in it. Maybe they just didn’t see it.”

Their loss was his gain, but despite the quantity he had instantly amassed, Dotz still wasn’t sure he had enough really good material for a book. That led him to private dealers (Dotz says Robert Booth was especially helpful) and more auctions online.

“I found a scrapbook made by a woman who had collected all the food labels she used from 1970 to 1972,” recalls Dotz of one auction. “I also found a supermarket’s salesman’s catalog that contained all the labels for its generic, store-branded products. When I bought that catalog, I was hoping I would find a fantastic pet-food label, and sure enough I did. It was for a brand of cat food called Corky—it looks almost like the Napster logo.”

As Dotz began to assemble the images for the book with his designer and collaborator, Masud Husain, he learned about the history of pet food, which can be pegged to 1860, when an American named James Spratt noticed how fond English dogs were of the “ship’s biscuits” sailors tossed from their boats onto docks in Liverpool. Spratt hired a local British company to manufacture biscuits for dogs, which were made of wheat, beetroot, and vegetables, and bound together by the naturally congealing properties of beef blood. He called his biscuits “Spratt’s Patent Meal Fibrine Dog Cakes.” By 1870, Spratt had opened a branch in the United States (his company was finally purchased by General Mills in the 1950s).

Until Spratt came along, dogs were fed kitchen scraps or, if their masters were wealthy, specially prepared ox-foot stew. Cats, meanwhile, who were kept largely for their ability to control the population of rats and mice on family farms, were often fed bowls of white bread soaked in warm milk, with fish for dinner if they were lucky.

For the burgeoning pet-food industry, this sort of homemade competition was an anathema. Accordingly, it preached the value of its products, which were designed for animals of different sizes and at various stages of life (for example, logic dictated that kittens and puppies had different nutritional needs than older cats and dogs, didn’t it?). “Right off the bat,” Dotz says, “the message was that to be a good pet owner, you had to feed your pet special foods. That’s how pet food has been advertised over the years. In 1964, an organization called the Pet Food Institute even started campaigning in magazines about the dangers of feeding pets table scraps and the importance of processed foods.”

Of course the contents of pet food changed over the years, often rather opportunistically. After World War I, when cars and tractors took over city streets and country farms, horse meat became a prime ingredient in canned dog food. During World War II, when tin was rationed for the war effort, pet-food manufacturers switched to dried kibble sold in bags.

“Cats were fed bowls of white bread soaked in warm milk.”

Often, the technology used to make pet food and people food was the same. In 1950, Ralston Purina made its Chex breakfast cereal with an extruder that cooked the ingredients before puffing them up with air. Seven years later, similar machines created Purina Dog Chow. In fact, at times, the ways in which pet and human food was advertised were not even terribly different. “Take a look at the Chuck Wagon label on page 20,” says Dotz of an image in “Dog Food for Thought.” “That was made by Purina, and the presentation looks the same as what you might see on a cereal box.”

Which brings us back to Dotz’s interest in art and design. “The first goal of any label is to catch the customer’s eye,” he says. “A dog-food label is no different. Considering that most canned dog food and dry kibble looks the same on the inside, the label art was important.”

In the 1950s and beginning of the ’60s, the designers working in the lithography shops that produced can labels continued the visual traditions established on fruit- and vegetable-crate labels, often depicting realistic-looking cats and dogs. Artists at ad agencies developed the campaigns for pet food packaged in boxes and bags. Eventually, both began to be influenced by the culture of the mid-20th century, from comic books, to Walt Disney, to television, especially Saturday-morning cartoons, which were sponsored, in no small part, by breakfast-cereal brands.

That’s why the images in Dotz’s book, which are organized by label name alphabetically, jump from realistic depictions of cats (Jack & Jill) and dogs (Fiesta) to ones that are highly graphical (Show was a regional brand, whose Saul Bass-like cat- and dog-food labels are almost identical). Somewhere in the middle are the labels that combine illustrated realism with the humor of cartoons—in the label for Cap’n Kit, one stern-looking tabby wears an eye patch, while the Cap’n himself sports a pirate’s earring. And then there are the labels whose characters are more purely cartoon, such as the gray kitty wearing a fisherman’s slicker selling “ALL-TUNA FISH” cat food for 9-Lives, or the happy yellow pup (known as Fido) on cans of Ken-L Ration, which introduced canned dog food to pet owners in 1922 to take advantage of all that suddenly available horse meat.

Each book in the series features 60 images and as many quotes about cats or dogs, each of which relates to the image on the pet-food label. 123456

Adding to the diversity of these labels was the postwar rise of suburbia and the resulting proliferation of thousands of regional grocery stores and perhaps hundreds of pet-food manufacturers, each one of which strove to differentiate its products from its competitors. This is not just idle speculation on Dotz’s part—he has proof.

“When I was going through the hundreds of labels in those four lots I won on eBay,” he says, “I noticed that a lot of them had little scribbles on their backs. It turned out that these labels had been collected by an executive of a pet-food company, who was making notes. It was mostly information about the consistency, the contents of the can, that sort of thing. I’m not sure he tasted them,” he adds, “but there were a lot of notes.”

(All photos reprinted from “Cat Food for Thought: Pet Food Label Art, Wit & Wisdom,” and “Dog Food for Thought: Pet Food Label Art, Wit & Wisdom,” both by Warren Dotz and Masud Husain, published by Insight Editions. © 2014)