help with fenbendazole for camallanus worms

a lot of my endlers and guppies are infected with camallanus worms, i just noticed today after losing one female and saw a few worms inside her abdomen. upon inspection, it seemed that a few of my other females and one male also had it. So I went to the store and bought some fenbendazole to treat it, as i live in canada so some other medicine to treat it is illegal. i tried to feed them some bloodworms coated it the medicine like the guy at my lfs said, but they don't seem to want to eat them.

tldr, most of my fish won't eat the bloodworms with the fenbendazole powder on it, what should i do?