Elephants also have a doula with them during birth. A smart zookeeper knows this. A breech baby elephant was born with the help of doula-elephant Num-Oi in the Melbourne, AUS zoo.
I remember hearing about and watching Raja's birth in the St. Louis zoo some years ago. His mother was in a long labor until the zoo keepers got the idea to bring in a female companion who had given birth her elephant self.
For people, I still recommend also having a person quite experienced in physiological breech birth.