We know that, aside from man-to-man combat, gladiatorial fights would often pit human gladiators against wild animals.
Is there any documented historical evidence that would show what was a bigger economic loss to the owner: losing a well trained gladiator, or losing a somewhat rare animal (say, a lion or a bear)?
For precision sake, let's define the loss in one of 2 ways:
Documented sale value of each
Documented expected profits from continuing to own each. I assume these would be harder to come by.