A free-ranging dog is any dog that is not contained. The term encompasses various loose categories relating to the ownership, behavior, and descent of such dogs, including wild dogs, feral dogs, stray dogs, street dogs, and village dogs, as well as dogs allowed to come and go freely by their owners. It sometimes overlaps with the polysemic term pariah dog. The term is used when distinctions of ownership are irrelevant.
Rural vs. urban free-ranging dogs
Ecologists find it important at times to distinguish between urban free-ranging dogs and rural free-ranging dogs. The distinction can be important as the ecological impact of, and evolutionary pressures on, these groups can be quite different.
Village dogs
Rural free-ranging dogs that rarely if ever leave a settlement are called village dogs. They are considered neither wild nor feral, and have less impact on the surrounding ecosystem than other rural free-ranging dogs. They pose a different set of environmental pressures than feral or wild dogs, or even free-ranging farm dogs. Experts on the behavior of early and primitive dogs have also noted interesting physical and behavioral differences between village dogs and other more feral free-ranging dogs. For example, village dogs tend to be smaller and to be found more often alone or in pairs.
Feral dogs vs wild dogs
In scientific literature, free-ranging dogs such as Australian dingoes are considered to be 'wild animals' rather than 'feral' to the extent to which they are not 'commensal': dependent on handouts and cast-offs from humans; and instead hunt and scavenge in the wild. Ecologically, wild dogs are integrated into the ecosystem, often as top predators. Evolutionarily, wild dogs are more profoundly changed by many generations apart from people. Both wild dogs and adult feral dogs are less easily kept as pets than free-ranging or captive dogs that have been socialized to humans. Unlike feral dogs, however, wild dogs tend to maintain their wild nature even when taken in as puppies
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http://en.wikipedia.org/wiki/Free-ranging_dog
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http://www.youtube.com/watch?v=GXJ_br_JBZIhttp://www.handicappedpets.com/
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