Nature knows no compassion. Even mother sheep only raise the offspring that they believe will survive. That's what evolution has given them. Batman's mother must have come to the conclusion that her little son was too weak and rejected him. Animal friends were able to prevent worse and took him in. He was lovingly raised with a bottle, but they were unable to offer him a life with other animals of his own species and so he became an Aiderbichler in February 2022.