Is the question for a bull dog or a real bull in a pen? If you go to google and type in "treats of bulls," or best treats for bull," you might be able to find what you are looking for. When I searched, I found a lot of information on bull dogs and not many on bulls. However, there is a professional bull riding website that I found using the same search terms. If you click on the google link, it will take you directly to the professional bull riding website and then you would look for a phone number or email address to contact the company with your questions. Good question, though and very interesting. Good luck.