Do you have a better recommendation for a wormer which kills all but tapeworms?
Are you by chance indicating that Twin City /or whatever that name is/ is merely a backyard gamefowl staker, and that one should question whether the product consists of multiple ingredients?
Fenbendazole, Flubendazole, Oxfendazole, Albendazole are all examples of benzamidazole classes of anthelmintics which are very safe and effective against most intestinal worms. Albendazole is effective against tapes and all other worms, and Praziquantel is highly effective against tapeworms. I am not indicating that Twin City is run by cockers. What I am saying is that they, like many of the game fowl supply places regularly sell dewormers which have no listed ingredients on the label, or origin of production, contact information, etc. People are suspicious of this and they should be.