SAFEGUARD (Fenbdendazole) is supposed to work for all worm types except tapeworms. It hasn't been approved by the Feds but I have researched it and from what I have found it seems fairly safe, as long as you wait at least two to three weeks before you eat any eggs. And you can't eat the meat. I haven't tried it yet, but the distributor says he's sold it for fifteen years and never heard of any problems. The dewormer you get at TSC or the feedmill is usually only for roundworms; I haven't seen anything at either place that treats anything but that. I'm definitely going to use it now cause I never knew what that yawning thing was; we've had a couple of ours do it. .