I just got back into town and should have come home to 3 new baby ducks. I didnt see them shaking in the small incubator so I candled them to see that they have all internally pipped but there is no shaking that I can see nor hear any chirping. Should I intervene? I know they were a good pair for parents because 3 just hatched last week successfully. The parents were taken by something in the wild so these little guys are their legacy. I have read oodles but just am not sure exactly what I should do. I did just externally pip slightly at the tips the shells and still I dont hear anything.