“Psychedelic-Induced Social Behavior in Mice: A Preliminary Report”, 1969-12-01 (; similar):
When large populations of mice were treated with LSD (2mcg/kg to 30mcg/kg), bufotenine (5mg/kg to 30mg/kg), a cannabis sativa extract (50mg/kg to 100mg/kg), or tetrahydrocannabinol (2mg/kg to 10mg/kg), there was a dramatic change in social behavior. Such treatment produced a statistically-significant reduction in aggression, group aggregation, and temporary disruptions of social hierarchies. Hallucinogenic-treated mice placed in normal untreated colonies were hypersensitive to auditory and tactile stimulation and aggregated in small groups apart from the rest of the population. Treatment with saline or BOL-148 produced no statistically-significant changes in behavior.
…When strangers were introduced into the drugged colonies, they were relatively ignored by the inhabitants. This was true whether the strangers were introduced in a drugged or undrugged state. If the strangers were undrugged, however, they moved about the colony investigating mice and inducing squealing and flight behavior in the inhabitants. And, if the strangers were dominant mice to begin with, they would often establish dominance over the entire colony, exploiting the food supplies and territories of the inhabitants.