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
Ticks of domestic animals create a potentially fatal inflammatory crisis of the blood. The name redwater (coloured urine) derives from the hemoglobinuria caused by the destruction of red blood cells infected with the merozoite stage of "Babesia"; anemia results from the same destruction. Horses suffer babesiosis or biliary fever when infected by "Ba. equi" or "B. caballi". This occurs in many countries where vector ticks are found, such as "R. e. evertsi", "Hy. truncatum", and "D. nitens". Dogs are at risk from severe infection with "Ba. canis" and its subspecies, transmitted by the dog ticks "R. sanguineus", "D. reticulatus", and "Ha. leachi". Domestic cats