Hi Elgin. We assure you that this is absolutely false. We do not buy our beef from a company called "100% Beef" or any variation of that name. Our beef supplier is Cargill. If you have never heard of Cargill, it's one of the biggest suppliers of beef in Canada. Despite what you may have heard or read on the internet, there are no fillers in our burger patties. They are made of 100% Canadian beef with just a pinch of seasoning. That's it. You might also want to check out how we answered a similar question from Jon in Toronto.