Flubenvet is a wormer to add to feed although it does not stick very well. Adding a tad of olive oil helps to stick it to the feed. For easy sake it's about 1/2 teaspoon to 2 kg of feed for a week. That's recomended for large chickens so I would say at least double that for a pea to 1 tablespoon. It's not an acurate measured way to worm but it's hard to overdose them on flubendazole ~
Acute Toxicity and Tolerance of Flubendazole
LD50 acute, rats, p.o. >5000 mg/kg
LD50 acute, mice, p.o. >5000 mg/kg
LD50 acute, chicken, p.o. >640 mg/kg
Safety margin in swine >20
In dogs, daily doses of 10 and 40 mg/kg 6 days a week during 3 weeks prostatic hypoplasia (reduced development) and congestion of cauda of the epididymis were observed in all males.
Broiler breeder pullets treated with flubendazole at 60, 80 and 120 mg/kg mixed in the feed during 7 days showed no toxic symptoms, excepting a lower hematocrit value and lower red cell count in the highest-dose group.
In pregnant sows treated at 8 mg/kg/day mixed in the feed from the day of mating after farrowing no significant abnormalities were found in the born piglets. The same was found after treatment at 50 mg/kg/day mixed in the feed from the day of mating until day 70 of pregnancy.
As a general rule dogs, cats and livestock tolerate flubendazole very well, usually without adverse drug reactions.
Toxic Symptoms caused by Flubendazole Poisoning
As a general rule, poisoning with flubendazole is quite unusual, due to its low toxicity, the high safety margins and the fact that most species tolerate it very well.