Animals feel the effects
Psilocybin 'shrooms grow in the wild, so it's perhaps inevitable that nonhuman animals have sampled these trippy fungi. In 2010, the British tabloids were abuzz with reports that three pygmy goats at an animal sanctuary run by 1960s TV actress Alexandra Bastedo had gotten into some wild magic mushrooms. The goats reportedly acted lethargic, vomited and staggered around, taking two days to fully recover.
Siberian reindeer also have a taste for magic mushrooms, according to a 2009 BBC nature documentary. It's unclear whether the reindeer feel the effects, but Siberian mystics would sometimes drink the urine from deer that had ingested mushrooms in order to get a hallucinogenic experience for religious rituals.