Prairie voles without oxytocin receptors can bond with mates and young

The vital role of oxytocin -- the 'love hormone' -- for social attachments is being called into question. More than forty years of pharmacological and behavioral research has pointed to oxytocin receptor signaling as an essential pathway for the development of social behaviors in prairie voles, humans, and other species, but a genetic study shows that voles can form enduring attachments with mates and provide parental care without oxytocin receptor signaling.

from Relationships News -- ScienceDaily https://www.sciencedaily.com/releases/2023/01/230127131135.htm