I have never tried cow pies (the polite term is chips), but burlap potato sacks work great. I get all I need free from one of the markets where I sell my honey. Roll one up and it just fits in the large Dadant smoker. Not much room for any leaves, though. Light them with a match and they burn for a very long time. This is probably what the UK beekeepers call heshian. Mark Jensen [log in to unmask]