This article is about the domestic dog. For other uses, see Dog (disambiguation). Domestic dog Fossil range: Late Pleistocene - Recent Conservation status Domesticated Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Canidae Genus: Canis Species: C. lupus Subspecies: C. l. familiaris Trinomial name Canis lupus familiaris (Linnaeus, 1758) Dogs Portal The dog (Canis lupus familiaris) descends from one or more years longer than that of purebred dogs (all breeds averaged).[39][38][40][41] As a rule of thumb, small breeds are longer-lived than large breeds, but some of the breeds with the shortest longevities are medium-sized.[42] "Median longevity" refers to the age at which half the dogs in a population have died and half are still alive. Individual dogs, even in breeds with low median longevities, may live well beyond the median. The dog widely reported to be the longest-lived on record is "Bluey, " purportedly born in 1910 in Australia. He died in 1939 at the age of geologically recent events. On balance, and in agreement with the archaeological evidence, 15, 000 years ago in East Asia. Verginelli et al. (2005), however, suggest both sets of dates must be reevaluated in light of recent findings showing that poorly calibrated molecular clocks have systematically overestimated the age of 29.5 years. Bluey is usually identified as an Australian Cattle Dog, but the first Australian Cattle Dog breed standard was written in 1902, [43] only eight years before Bluey's birth. It is unclear how closely Bluey was related to the breed as it exists today. The Bluey record is anecdotal and unverified.[44] The longest verified records are of dogs living to 24 years.[44] Diet Nutrition There are a great quantity of commercial foods and treats marketed for dogs, and not all are recommended as part of their natural instincts as pack animals closely mimics the human idea of love and friendship, leading many dog owners to view their human companions as members of their pack, and make few, if any, distinctions between their owners and others who come in contact with them. It is not uncommon for dogs to attack humans and other animals; however, this is usually because of lack of care or improper upbringing by its owner. Differences from other canids Dogs tend to be poorer than wolves and coyotes at observational learning, being more responsive to instrumental conditioning.[20] Feral dogs show little of the complex social structure or dominance hierarchy present in wolf packs. For dogs, other members of their kind are of no help in locating food items, and are more like competitors.[20] Feral dogs are primarily scavengers, with studies showing that unlike