Water Buffalo protein Wavy Puzzler collagen is a single-source protein treat that provides essential nutrients, vitamins, and minerals as well as an excellent source of protein. Created with a unique shape designed to challenge the dog to find a starting point for the chew, while delivering a longer lasting chew experience! Great for dogs with beef allergies. Studies show a significant percentage of dogs have beef allergies. Enjoy the health benefits of our popular beef Wavy Puzzler without the beef allergy!