Without a smear, and a microscope, it's going to be a bit of a guessing game. PraziPro treats nematodes (worms), and flukes. Metronidazole is designed to kill intestinal parasites such as Spironucleus vortens, aka Hexamita.
Fenbendazoleis typically ray safe. It is also equivalent to dosing with prazi and levamisole together. I dose once a week for three weeks. It is very hard to dissolve in the water.
As RD said with out a fecal its a guessing game