Feet.—Large and round; toes well arched and close; nails very strong and curved.
Hair.—Very short, hard, and close.
Height (minimum).—Dogs, 30 inches; bitches, 28 inches.
Weight (minimum).—Dogs, 120 pounds; bitches, 100 pounds. Nothing under these should compete.
Color.—Various shades of gray, red, black, pure white, or white with patches of above colors; also brindles and mottled colors.