Is there a list of good safe dog treats on the internet?

How about doing like the owners do for show dogs? My folks used to show dogs and would take bits of liver (or other meat if you can't stand liver) and would bake them till they were almost as hard as store bought treats. They put them in zip locks and the dogs loved them! You KNOW how those are cooked......:) :) and WHAT the meat is. and they're MADE IN THE USA.