Original sentence: The Karakachan dog is a descendant of the ancient Balkan domestic dogs, probably since the time of the Thracians.The dog is named after the Karakachans, Balkanian nomadic shepherds
Edited sentence: The Karakachan dog is a descendant of the dogs of the Thracians - the oldest inhabitants of the Balkan peninsula, renowned as stock-breeders, whom Herodotus describes as the most numerous people after the Indian one.The Proto-Bulgarians also played an essential part in the formation of the Karakachan dog as they brought their dogs with them at the time of their migration from Pamir and Hindu Kush.The dog is named after the Karakachans, nomadic shepherds of Thracian origin