Origin of the domestic dog them to more successfully adapt to the human habitat. Even today, the wolves on Ellesmere Island do not fear humans, which is thought to be due to them seeing humans so little, and they will approach humans cautiously, curiously and closely. Some studies have found greater diversity in the genetic markers of dogs from East and Central Asia compared to Europe and have concluded that dogs originated from these regions, despite no archaeological evidence to support the conclusions. One reason for these discrepancies is the sustained admixture between different dog and wolf populations across the Old and New Worlds over
Dog flea of the toxicity of flea treatment products have been scientifically studied and are available online from the Natural Resources Defense Council. Dog flea The dog flea ("Ctenocephalides canis") is a species of flea that lives as an ectoparasite on a wide variety of mammals, particularly the domestic dog and cat. It closely resembles the cat flea, "Ctenocephalides felis", which can live on a wider range of animals and is generally more prevalent worldwide. The dog flea is troublesome because it can spread "Dipylidium caninum". Although they feed on the blood of dogs and cats, they sometimes bite humans. They can