Hello:

I looked this up in the Merck Veterinary Manual. It said that:
"Fenbendazole at 20mg/kg for 3-4 days is effective for removing gapeworms in pheasants. Tetramisole at 3.6mg/kg for 3 consecutive days in the drinking water removes gapeworms. Poultry treated while larvae are migrating in the body develop immunity to gapeworms, even though therapy may abort larval migration. Levamisole fed at a level of 40ppm for 2 days or at 2 g/gal drinking water for 1 day each month has been proved to be an effective control in game birds. Mebendazole fed prophylactically at 64 ppm or curatively at 125 ppm is effective in turkey poults. Cambendazole gave control when given in three treatments of 50 mg/kg for chickens and 20 mg/kg for turkeys.

This probably does NOT answer your question about the Safe Guard. Paste is tricky. When my dogs get tapeworms, I give them a pencil-eraser size dose, which I smear directly from my finger, into their mouth. This has always proven to be effective against TAPEWORMS. My dogs weigh from 40-56 lbs.

In my experience (and according to my vet)- it's always better to slightly over-dose, than under-dose, and there is a wide safety margin in the the wormers available to us.

I don't have a scale to weigh my livestock (sheep) when I worm them, so I always tend to over-dose to be on the "safe" side. I've never lost a sheep from over-dosing wormers, but I have no idea if this is true for poultry. Obviously - the sky is NOT the limit, and you would have to be careful.

I'd be interested in hearing from more experienced poultry keepers as to what they do for this problem. There's no vet in my area that works with poultry, so I need to learn as much as I can too.