Interesting read on placebo (and other) effects in dogs:
In 2003, a team of researchers from several American universities launched a small clinical trial, the results of which should not have been a surprise. Of the patients taking the active drug, an anticonvulsant intended to reduce epileptic seizures, 86 percent saw their seizure frequency fall. So did 79 percent of the patients that received a sham treatment, or a placebo.
It seemed like a classic example of the placebo effect, with one notable difference: The patients were dogs.
https://www.theatlantic.com/science/archive/2019/11/danger-pet-placebo/601489/
In 2003, a team of researchers from several American universities launched a small clinical trial, the results of which should not have been a surprise. Of the patients taking the active drug, an anticonvulsant intended to reduce epileptic seizures, 86 percent saw their seizure frequency fall. So did 79 percent of the patients that received a sham treatment, or a placebo.
It seemed like a classic example of the placebo effect, with one notable difference: The patients were dogs.
https://www.theatlantic.com/science/archive/2019/11/danger-pet-placebo/601489/