Westminster Pet Products-American Beefhide Flat Knot Bone. Westminster Pets has taken first quality beefhide from American raised cattle to create this line of American Beefhide bones and chews. American Beefhide offers a durable, long lasting, chew that also helps maintain canine dental health. This package contains six American beefhide flat knot bones between 4 inches and 5 inches long. Made in USA.