Verrrrry interesting...........
LINK to interesting read
So what in this is new CG, Females of all mammals have the proper ability to feed the young by species. Some can cross feed, humans can drink the milk of a Goat, a cow or Camel.
Animals can cross feed, rabbits can feed on a cats milk and any mammal can survive on cross feeding unless the mother decides to eat them all up.
I don't know if it was the memories of, ----- How the hell he spelled his name,-the shoe pounding leader of Russia about the famine in Russia and what he as as a young man saw.
He stated that to his shock he saw men that under great stress lactating to feed infants.
True or not, but not impossible. Has to be a reason gave both sexes nipples, life will find a way.