A test was done several years ago in one of the European countries, don't remember which one. These test, which I don't believe by the way, found that cow sinew was actually better than Deer sinew. I do know that it is just as good as as Moose or Deer or Caribou sinew but as Steve says it is quite greasy. When I have used it I washed it with dish soap and warm water before using it. The leg tendons are what you want to use. The big neck tendons are useless