This place is unbelievable, the more you look into it. 26 employees and 138 volunteers for 39 monkeys.
The possible conclusion: very spoiled monkeys or improvable work organisation efficiency.
I wonder whether for some of the (potential) participants, volunteering there and in similar institutions is a bit like a methadone program for junkies: not being able/willing to fulfill their innermost wish to have a pet monkey/tiger etc. and yet still wanting to experience said critters, they choose the next best thing. A better solution for both human and animal?