Hey everyone

I have two whites tree frogs they are about an 1.5 to 2 inches How often should i feed them small crickets and how many. And I have been feeding them about 12 crickets every two days and the one is an absolute pig meanwhile the other one is slightly less agressive. I let the crickets roam free in the cage and the next morning there is usually only one or two crickets left in the teranium. Am I doing this right ??