MALPOSITIONS SEE THE LINK FOR POSITIONS I MADE BIG BELOW
It is common to lose about 1-2% of the chicks due to deformities and malpositions. Deformities occur during embryo development, while malpositions occur the last week of incubation. Malpositioned embryos are unable to pip the eggshell and escape due to improper positioning within the egg. The chicks can have difficulty positioning for pipping, absorbing the yolk sac, or changing from embryo to chick breathing air. The majority of malpositioned embryos that have died in the shell probably resulted from exhaustion and/or lack of oxygen. One GOOD thing to remember is that SOME malpositions are Lethal and some are not! Occasionally, malpositioned chicks will hatch unassisted but the hatch does need to be monitored closely to ensure that the chick is not becoming stressed, or stuck. Often as a result of the position in the shell they have been unable to absorb all of the yolk. Please refer to Navel SECTION BELOW.
Common reasons of Malpositions are:
Eggs are set with small end up.
Advancing breeder hen age and shell quality problems.
Egg turning frequency and angle are not adequate.
Inadequate % humidity loss of eggs in the setter.
Inadequate air cell development, improper temperature and humidity regulation, and insufficient ventilation in the incubator or hatcher.
Imbalanced feeds, elevated levels of mycotoxins, and vitamin and mineral deficiencies.
Lower than recommended temperatures in the last stage of incubation.
Normal hatching position and the six recognised malpositions Images:
http://www.thepoultrysite.com/artic...-hatchery-practice-examining-the-hatch-debris
ASSISTING MALPOSITIONED CHICKS
Be extremely careful not to puncture the membranes directly under the shell as this is likely to cause a bleed. The external pip of a malpositioned chick is actually
both an internal and external pip, these are also the hardest to deal with because they are made directly into a fully active membrane and not into the safety of the air cell.
PLEASE READ THIS ARTICLE IN ITS ENTIRETY
BEFORE YOU ATTEMPT THIS ASSIST!
The decision to intervene and how fast to progress with assistance is not simple and there are NO RULES except… SLOW SLOW SLOW HOURS HOURS HOURS and MORE HOURS!
A chicks chances are slim with these kinds of malpositions so recognize that your trying to give it a chance to live! I have lost a few malpositions and saved a few! EXPERIENCE WITH ASSISTING is VERY HELPFUL! Assistance should take place in stages. Stopping after each stage of assistance gives the chick a chance to complete the hatching by itself.