The stamp art for Pets features 20 existing photographs of different animals. Each photograph represents animals we love from these groups: puppies, betta fish, iguanas, hamsters, goldfish, parrots, guinea pigs, tortoises, rabbits, kittens, corn snakes, mice, hermit crabs, chinchillas, gerbils, dogs, parakeets, horses, cats, and geckos.

More than half of U.S. homes have at least one pet, with the number growing every year. The most common domesticated animals are dogs and cats, but pets come in all shapes and sizes. Pets offer their human companions unconditional love and happiness, as well as physical and emotional health benefits. They are more than just animals; many people consider them members of the family. Whether you prefer the silky scales of a corn snake or the warm fluff of a guinea pig, responsible pet ownership begins with familiarizing yourself with the animal possession laws and regulations in your area and finding the right pet for your life and needs. Choosing a pet whose specific needs you can understand and accommodate will ensure that your new animal friend will live a happy, healthy, and safe life.

Hamsters are rodents belonging to the subfamily Cricetinae. The subfamily contains about 18 species, classified in six or seven genus/genera. Hamsters are stout-bodied, with tails much shorter than body length and have small furry ears, short stocky legs, and wide feet. Their thick, silky fur, which can be long or short, can be black, grey, white, brown, buff, yellow, "sapphire" or red depending on the species, or a mix of any of those colors.

Behavior can vary depending on their environment, genetics, and interaction with people. Because they are easy to breed in captivity, hamsters are often used as lab animals in more economically developed countries. Hamsters have also become established as popular small pets.

Hamsters are crepuscular. In the wild, they burrow underground in the daylight to avoid being caught by predators. Contrary to popular belief they are a nocturnal animal. Their diet contains a variety of foods, including dried food, berries, nuts, fresh fruits and vegetables. In the wild they will eat any wheat, nuts and small bits of fruit and vegetables that they might find lying around on the ground, and will occasionally eat small insects such as small crickets or mealworms. They have elongated fur-lined pouches on both sides of their heads which extend to their shoulders, which they stuff full of food to be brought back to the colony or to be eaten later.