Ya being babies they need to eat so whatever works for them at the moment is what I would stick with. But I wouldn't give up the tong feeding, I would even just pick up the odd piece of worm or roach while they are in there tub feeding already and see if you can trick them to eat from them since there already in feeding mode. But again whatever works for them and as long as they are eating something I wouldn't overly stress about the tongs, they will come around eventually.