
Puppies learn behaviors quickly by following examples set by experienced dogs.[53] This form of intelligence is not peculiar to those tasks dogs have been bred to perform, but can be generalized to myriad abstract problems. For example, Dachshund puppies who watched an experienced dog pull a cart by tugging on an attached piece of ribbon in order to get a reward from inside the cart learned the task fifteen times faster than those who were left to solve the problem on their own.[53][98] Dogs can also learn by mimicking human behaviors. In one study, puppies were presented with a box, and shown that when a handler pressed a lever, a ball would roll out of the box. The handler then allowed the puppy to play with the ball, making it an intrinsic reward. The pups were then allowed to interact with the box. Roughly three-quarters of the puppies subsequently touched the lever, and over half successfully released the ball, compared to only 6 percent in a control group that did not watch the human manipulate the lever.[99] Another study found that handing an object between experimenters who then used the object’s name in a sentence successfully taught an observing dog each object’s name, allowing the dog to subsequently retrieve the item.[100]

The Dingo (Canis lupus dingo) is a domestic dog which has reverted to a wild state for thousands of years and today lives largely independent from humans in the majority of its distribution.
Most store-bought dog food comes in either a dry form (also known in the US as kibble) or a wet canned form. Dry food contains 6-10% moisture by volume, as compared to up to 78% in canned food. Semi-moist foods have a moisture content of 25-35%. Pet owners often prefer dry food for reasons of convenience and price. Besides the lower price, dry pet food can also be left out for the animal to eat at will over the course of several days; whereas canned food spoils or becomes unappetizing after several hours. On the other hand, canned food has a longer shelf life than dry food. Canned food can also contain more protein and fat than dry dog food.