Don't visit and support Zoo's. Most of the Captive animals end up looking like this. They die of kidney failure due to overweight, they start behaving strange and stop behaving like lions, but more like animals in pain.
Do support and conserve the wild lions! then you help sustain the few lion families that are left. Cause at the end of the day you want the lions to be as they are in nature, where lions looking healthy like this, you don't want lion king to be an obese lion with kidney failure!!!