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A long dog (also long-dog or longdog) is any dog of sighthound type, whether pure-bred or not. [ 1 ] [ 2 ] It is usually a cross-breed between two sighthounds of different breeds, one of which is usually a Greyhound [ 3 ] [ 1 ]
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Experts estimate that due to their long association with humans, dogs have gained the ability to thrive on a starch-rich diet that would be inadequate for other canids. Dogs have been bred for desired behaviors, sensory capabilities, and physical attributes. Dog breeds vary widely in shape, size, and color.
This list of dog breeds includes both extant and extinct dog breeds, varieties and types. A research article on dog genomics published in Science/AAAS defines modern dog breeds as "a recent invention defined by conformation to a physical ideal and purity of lineage".
This is an accepted version of this page This is the latest accepted revision, reviewed on 30 January 2025. This is a list of the oldest verified dogs in the world, listed by age, all of whom have attained the minimum age of 20. Aging in dogs depends on many factors, including breed, size and diet. Longest-living dogs verified by age Rank Name Birth date Death date Age Breed Home country 1 ...
A blue Australian Cattle Dog (Bluey's breed) Bluey's age, along with that of "Chilla", a Labrador Retriever and Australian Cattle Dog mix reported to have lived to the age of 32 years and 12 days (but not certified by Guinness), [8] prompted a study of the longevity of the Australian Cattle Dog to examine if the breed might have exceptional longevity.
By selectively breeding these animals, breeders eventually produced a dog which consistently produced long-haired offspring, and the long-haired dachshund was born. Another theory is that the standard long-haired dachshund was developed by breeding smooth dachshunds with various land and water spaniels.
A study of dog remains indicates that these were selectively bred to be either as sled dogs or as hunting dogs, which implies that a sled dog standard and a hunting dog standard existed at that time. The optimal maximum size for a sled dog is 20–25 kg based on thermo-regulation, and the ancient sled dogs were between 16 and 25 kg.