hatching

[chasep]

okay so i set 15 eggs on December 29th and on the 20th i had 2 hatch but after none hatched so being that its the 25th i knew these other 13 were not going to hatch. so i did what had to be done and threw them out. i candled them and kept up with them until the 18th day and everything seemed to be fine. but when cracked open these other 13 eggs today they all had little chicks in them. fully developed. does anyone have a suggestion to why these did not hatch? and just died at the very end my other 2 that hatched on the 20th are fine

 

[BeckyLa]

This question is going to be very hard to answer without more information. Maybe the humidity was too low, the breeding stock not healthy enough or too inbred. There are many variables. Tell us about your hatching process and maybe someone will have your answers.