I've almost been bit, they get so enthusiastic when you are feeding. I use those baby sized zoomed tongs as well though. I probably deserve to get bit for using them.
Could not use those yellow ZooMed tongs because Stilgar would target my hand. Once my Pacman bit me using those too . Wish they where 12 in. long .
Remember to take care of the enclosure and it will take care of your frog !