I put thawed frozen blood worms and brine shrimp onto to metal tweezer and place them in front of my African Dwarf frogs to feed them. Only problem is they nibble on the mettle tweezers and I'm afraid their too sharp. Any better safer way you place frozen food in front of AFD'S mouths. Maybe squishing food onto rubber glove and having frogs eat off of the glove? Seems to work sometimes.