The prairie dog (Cynomys) is a small, burrowing rodent native to the grasslands of North America. On average, this stout-bodied rodent will grow to be between 12 and 16 inches (30 and 40 cm) long, including its short tail. They are found in the United States, Canada, and Mexico. In the U.S., prairie dogs are primarily found west of the Mississippi River, though they have also been introduced in a few eastern locales.The prairie dog (Cynomys) is a small, burrowing rodent native to the grasslands of North America. On average, this stout-bodied rodent will grow to be between 12 and 16 inches (30 and 40 cm) long, including its short tail. They are found in the United States, Canada, and Mexico. In the U.S., prairie dogs are primarily found west of the Mississippi River, though they have also been introduced in a few eastern locales.The prairie dog (Cynomys) is a small, burrowing rodent native to the grasslands of North America. On average, this stout-bodied rodent will grow to be between 12 and 16 inches (30 and 40 cm) long, including its short tail. They are found in the United States, Canada, and Mexico. In the U.S., prairie dogs are primarily found west of the Mississippi River, though they have also been introduced in a few eastern locales.