TIL Cows have Best Friends and can become stressed when separated from their buddies. They even have preferred grooming partners! Mooo

https://www.theguardian.com/commentisfree/2011/jul/07/cows-best-friends

https://www.reddit.com/r/todayilearned/comments/165x72f/til_cows_have_best_friends_and_can_become/