Preventing dehydration of day old chicks at the hatchery

• Chick yield
• State of the eggshell at hatch

A desired chick yield should be between 67-68%. This ensures that we will have active chicks ready to eat and drink as soon as they are housed at the farm. Yields below 67% can lead to dehydration, as this means that there are less yolk reserves. Chicks with low yield are often overactive and noisy.

Analysing the amount of fecal dirt (meconium) on the eggshells at the time of the hatch is an effective indicator whether the chicks have been in the hatcher for too long or not (very long hatch window).

The procedure consists of selecting the dirtiest eggs from random hatcher trays (ideally 5 trays/hatcher). Figure 1 shows what egg shells should look like on hatching trays. The goal is to get a score between 1 and 2. If the eggshells are too stained, the following key points should be checked:

• Hatch window too long
• High temperature in the incubator
• Incubation time too long

Figure 1. Status of the eggshell at hatch

Table 1. Summary of optimal conditions in the chick holding room and chick transport. Temperature, humidity and air speed should be checked to prevent chicks from panting, thus losing water at a higher speed, leading to dehydration. Chicks that are not at a correct body temperature will have a lower performance than the rest.