X2! Stretch the the curled toes out as they should be alot and they will normally be ok. This has to happen early on thou, dont wait! after a few days you wont fix them. some use masking tape too to make little duck feet holding the toes as they should be....
I would not "pip" a egg...... I have helped many chicks in the situation Laura describes. But actually breaking the shell is different. There is something wrong with a chick that cant pip..... Can you end this chick if need be? If the answer is no, then IMHO, you have no business opening that...