Your decision of course, but if they're only six days old it should be okay. I put a drop of castor(any) oil inside the band and I use one of those pointy rubber dental things to pull the back toe through. Some use the quill end of a shed feather for this. As long as you can work the band over the knuckle far enough to insert what you use between the back toe and the leg, you can gently pull the toe through. At that age the toe bone are flexible not hard. Whatever you do, the main thing is the babies are thriving, right? How about some new pics?