It's day 20. I stopped turning on day 18, as usual. But this morning I discovered something alarming - 4 malpositions. 4. Out of 13. What is wrong???? All 4 pipped through the shell and there is no blood (yet) so I hope they stay put long enough to absorb everything and hatch safely. I am able to assist if needed, I have done it before, but 4 whole chicks pointed the wrong way? Something had to have happened. 3 others are pipped normally. Help?