It is good to score baby chicks by incubator. You might find that one incubator produces more navel issues than others. This monitoring, along with corrective actions, can save you from further performance loss. Also, it is important to take temperatures of the baby chicks as they hatch. This will indicate whether our incubation process is running properly. Programmes, from setting to transfer to pull, are important too. Be consistent about when you set and transfer eggs. Adjust set times only for egg age, fluctuations in embryonic temperatures and skipped sets. The total incubation target time is 504 hours. There is nothing wrong with adding a few hours but do so carefully and make it part of your hatchery programme in order to not negatively impact broiler performance. If we set up programmes to pull at 506 hours (that is when the pull should occur) - don't pull at 512 hours. If variation occurs then we are holding chicks longer than the profile calls for and something is wrong with incubation.