Maintaining a bachelor herd is different to what EAZA has intended to change which is to leave growing male calves as long as possible close to their maternal group. Right now, the bulls are sent away when they are 6-8 years old which is unnatural and too young (where bulls start forming bachelor groups in their early teens and their maternal group indicates it is time to leave the security of the herd.Everyone who builds right now needs to integrate a part for a bachelor group to solve the problem of the many young bulls. Since breeding is slowed down it can be that Lodz has to wait some years before getting a herd.
Collections will be needed going forward to keep solely bachelor bull groups indefinitely as well as non reproductive cow elephants in older age.