Damn, it's your frog, but I wouldn't feed it live mice...
Prekilled is WAY cooler, everyone knows that. I mean if you have to interfere with the feeding to make sure your frog doesn't get hurt... you know it's wrong lol.
Usually I usually feed him hoppers which he takes it down in one gulp but figure I go a size up this time. Going back to hoppers or I will stun them first before feeding next time.