The first animal crackers were produced in the US in 1871 by the Stauffer Company, and became so popular that other manufacturers began producing their own versions.
Near the end of 1902 and close to the holiday season, the National Biscuit Company debuted Barnum’s Animal Crackers, which had a circus themed box complete with a string on the top. It was intended to follow the popular European tradition of hanging children’s snacks on Christmas trees as gifts, but the packaging with the string was kept year-round.
More about animal crackers:
Animal crackers are, no doubt, what gave rise to People Crackers for dogs. The box looked exactly like Animal Crackers, including the string. The crackers were shaped like people that dogs usually bite,i.e., postman, policeman, etc. It was a neat idea, and our toy poodle loved them. They are a good size for small dogs. Unfortunately, the packaging has changed. Too bad. It was a neat idea.