Yeah, have to echo some of the comments here. These medications are not 'snake oily,' so I don't know if you just intended to use a different phrase. These medi

Yeah, have to echo some of the comments here. These medications are not 'snake oily,' so I don't know if you just intended to use a different phrase. These medications are actual pharmaceuticals and some of them based on human formulations (notably, the anti-worm medications). In the third-world, parasites are the leading cause of death in humans and even in the first-world there are people that get some of these parasitic worms. It's easy to dismiss their necessity when you haven't been affected by the disorder. http://en.wikipedia.org/wiki/Confirmation_bias http://en.wikipedia.org/wiki/Confirmation_bias Edit: To clarify my personal recommendations as a dog owner, I use heartworm prevention and flea prevention as well as recommended vaccines. I don't use the other meds unless the fecal sample comes back positive for parasites; something that should be tested at a yearly vet visit.