So this is what I know about Valbazen...
There is a study that shows the most effective dose is 20 mg/kg, which is about what most people on BYC give. That study says that at 20 mg/kg that Valbazen was 90 something percent effective in the removal of a type of capillary worm. I am concerned though, because I recently read something that suggested the dose should be higher to treat capillary worms, so I want to look into that. Some of my peafowl friends use it for capillary worms in their birds, so I will ask them what dose their vets have them use.
Note that I am not saying that Valbazen doesn't treat capillary worms in one 20 mg/kg dose, I just want to do some more research on it.