The Durafend is fenbendazole, which is good for most type of worms but debatable as to whether it will treat tapeworms (some vets use it, research suggests higher dosage, but studies appear inconclusive).
So for treating tapeworms, casportpony is correct that the praziquantel is necessary...and you have that in the Equimax which is not in the Durafend.
The Equimax also contains Ivermectin for which I have studies that show that it is effective for nematode type worms (which excludes tapes) in poultry IF you treat 3 consecutive times, 7 days apart. Ivermectin is very efficient against northern fowl mite and scaly leg mite but not red rooster mite (unless the population has gained a resistance).
I personally like Ivermectin for external parasites if regular dusting is no longer working. I have seen it work wonders in a population explosion. I trust the studies that it is effective for internal nematodes if administered correctly. (Personal visual experience tells me that my birds definitely plump and do not have external evidence of worms after treatment, but I have not done fecal floats to check efficacy).
So I think you made a good choice with the Equimax....it will cover tapeworms, the major common nematodes (round worms, cecal, capillary) as well as external parasites (lice and mites).
Casportpony will have dosage advice for your turkey (after you weigh it). I recommend treating 3 times for the Ivermectin part, but I am not sure what the recommendation/limitation is for the praziquantel....I do know that tapeworms are more problematic and that you must interrupt the cycle to prevent reinfection, which means getting rid of the slug or fly that is depositing the intermediary. Also clean and through away litter.
LofMc
