03 Sep 2021

Chick dehydration and other hatchery problems

The days after the transfer will be very important so that our birds can hatch without incurring a great physiological expense and thus express all their genetic potential on the farms. During this time, the birds must...

Juan Carlos López. MVZ, MVSc, PhD

Médico veterinario zootecnista por la Universidad de Tolima

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This article will show some studies on temperature, humidity, carbon dioxide in hatcheries and their positive or negative results. Among the negative results, dehydration stands out.

The days after the transfer will be very important so that our birds can hatch without incurring a great physiological expense and thus be able to express all their genetic potential on the farms.

During this time, the birds must make changes in their body posture, absorb the yolk, pipping, start their lung respiration and free themselves from the eggshell that has protected them for 21 days.
This demands perfect synchrony between what the embryo’s metabolism demands and what the environment can provide.

TEMPERATURE

As in incubators, the temperature is the crucial factor in hatchers.

STUDY 1

In an experiment carried out by Yildirim and Yetisir (2004), broiler eggs from day 17 were exposed to different ambient temperatures in hatchers:

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36.1 ºC,
37.2 ºC,
38.3 ºC,
39.4 ° C.

Eggs exposed to 37.2 ° C and 38.3 ° C had the best hatchability

The authors highlight that if the eggs exposed to low temperatures had been given extra time, the hatch might have been better, as other studies have reported (Wilson 1991). In this study, no differences were reported in the percentage of malpositions between the treatments.

STUDY 2

Maatjens 2016 in her doctoral thesis reported that eggs exposed in the hatchery to low temperatures measured in the shell: 36.7 ° C (98.06 ° F) compared to 37.8 ° C and 38.9 ° C (100.4 and 102.2 ° F), if given additional time (6 hours in this case) will not only achieve a percentage of birds born equal or

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