My brother use homeopathic medicine on his pet dog in order to cure an auto-immune blood related problem that conventional medicines couldn't deal with. The dog is now in fantastic shape (all the tests are coming back normal) and the dog suffers none of the negative side effects associated with the conventional medicines. How does the placebo effect work with dogs then?
It doesn't. The dog would have gotten better without the treatment. My doctor once pointed out that 80% of the people that come to him for treatment would be all better in 10 days or less without treatment. Spontaneous healing is the norm. You've been suckered by snake oil salesmen. They have been making fortunes off this scam since the dawn of time.
I could hang a shingle outside my door, and no matter what I practice - foot reflexology, chiropractic, homeopathic nostrums, Barley Green therapy, iridology or psychic healing, or Tibetan medicine for that matter - ANYTHING will have that 80% success rate. And my "patients" will of course only know that they came, were treated, and they got better, (well most of them) and they invariably fall for the idea that the treatment caused the cure. Almost nobody examines that assumption carefully. Certainly the "healers" won't. They get an income and status from their work, they all have an 80% minimum success rate, why would they question? Why would they throw away years of worthless training and get a McJob?
But the real barbed wire snag is that the same reasoning applies to standard medicine as well. Whether one is legit or not, there is still a LOT of money floating around the health field. This has caused enormous financial pressure on the processes that determine efficacy, so that even formal, double blinded, university conducted tests and trials can no longer be trusted. The result is that the drug market is flooded with poorly tested medicines that have marginal benefits and many serious harmful effects.
So who can you trust? Sadly, you can't trust anyone all the time, but the standard doctor in a white coat does have a nearly 100% success rate with some things. You can trust him to set your broken bones, suture your cuts and scrapes, lance boils and they are pretty good with infections. But the moment he hands you a pill with a name a yard long, you're on your own. It might be good, it or might wreck your kidneys, or your liver, or send you into some psychotic hell of no return in twenty years. There's just no way to know.
By the way, there is no safety in natural organic herbal type medicines. Plants cannot fight with their hands, so they fight with poisons. Most of our medicines come from poisons plants have developed to kill fungi, bacteria, insects and browsing animals. For instance, the alkaloids - codeine, morphine, heroin, cocaine, caffeine, nicotine, quinine and thousands of others- are deadly poisons that act on insect nervous systems. They also have interesting effects on mammalian nervous systems so we consider them medicines or drugs. Plants that do not contain such poisons are usually not considered medicinal. Those plants that just happen to be full of poisons that have no effect on the human animal are often referred to as "food". Many of our domestic food varieties of plants have been selectively bred for low production of noxious compounds, by the simple means of breeding out the ones that taste bad. The sense of taste is fairly good at detecting plant poisons, they usually taste bitter (if they are detected at all).