What are the differences between human lice and dog lice in terms of their behavior and impact on their respective hosts?

Human lice and dog lice are different in behavior and impact on their hosts. Human lice are specific to humans and feed on human blood, causing itching and discomfort. Dog lice, on the other hand, are specific to dogs and feed on their blood, leading to skin irritation and hair loss. Both types of lice can spread easily in close contact situations, but human lice are more common and easily treated with over-the-counter medications, while dog lice may require veterinary treatment.