Actually, I don't think anyone who posted here is actually completely against chemical wormers....I did ask for all sides of the equation.
This fall I took a CE course designed for MD's on "Nutraceutical Intervention...blah blah blah" (can't remember the entire LOOOONG name of the course right now) and we reviewed tons of research on natural substances. This course was for human MD's, mind you, not veterinary practice.
One of the problems with the research of natural plants and extracts is that no one wants to spend the money to fund it. It takes MILLIONS of dollars to finance research for pharmaceuticals, including chemical wormers, and the companies stand to make BILLIONS over the life of the patent, so they risk the upfront cost. Not so for a plant that anyone can grow in their garden or find in the woods. Yes, many pharmaceuticals are based on plants, but usually a synthetically produced version, which can be patented.
Also, many studies (underfunded and small, often) utilize only one herbal or extract, when in reality, they work best in combination with others, rarely alone (a little known fact.) Sometimes they are in a form that is not bioavailable. Sometimes the study is sneakily funded by big pharma when a lawsuit is pending, to try to cast reasonable doubt....it wasn't our drug that caused the heart attack, these people were all taking vitamin E, too
There are dedicated people out there who conduct their own "research" by using natural programs and tracking the health of their animals in responsible and educated ways, using fecals and carefully tracking production. Joel Salatin is one. I respect this research, and also understand that what works on one piece of land with a certain group of animals with their unique genetic strengths and weaknesses might not work for another owner.
I am a big fan of "empirical evidence" for this reason.
There are also articles and research studies available online that come from countries that do not have the political restraints that are found in this country. Don't be fooled into thinking that all the rules and regs are for our protection. There is a lot of money behind many of them. What really protects us is the threat of litigation, which generally happens AFTER many are injured, and so much money has been made, it is barely a blip on the financial radar of the giant corporation.
We need a soapbox smiley.....