The opening song of Into the Woods has Jack’s mother scolding the future giant-slayer, who refuses to sell the family cow.
We’ve no time to sit and dither
While her withers wither with her,
and no one keeps a cow for a friend!
Unfortunately for the mother, two people do keep a cow for a friend.
Credit: DC Wikia
Yes, the Caped Crusaders rescued a cow from the slaughterhouse. Well, really it was Batman’s son Robin and Batman just had to roll with it. But it’s not like the Dark Knight allowed Bat-Cow to enter the Batcave.
Well, um, at least Batman never let Bat-Cow go on missions.
Credit: Calvin’s Canadian Cave of Cool
Seriously, Batman even relied on Bat-Cow for emotional support when there was a death in the family.
Credit: Retcon Punch
So, Jack’s mother. People do keep cows as friends. Dark, brooding people.