The farrowing behavior of sheep is a complex process that is influenced by a variety of factors. In nature, sheep usually give birth during the day, as this is the time when they are most active. However, in a modern agricultural setting, many factors can affect the timing of labor. 
First of all, genetic factors play an important role in determining the timing of a sheep's delivery. Different breeds and strains of sheep have different farrowing habits. For example, some sheep breeds are more likely to give birth at night, while goat breeds are more likely to choose to give birth during the day. This suggests that genetic factors play a key role in determining the timing of a sheep's farrowing. 
In addition, environmental factors also have an impact on the timing of farrowing. Factors such as climatic conditions, seasons and light hours can all affect sheep reproductive and farrowing behaviour. During cold winters or hot summers, sheep may adjust their farrowing times due to environmental stressors. For example, during the cold season, to protect newborn lambs, ewes may choose to give birth during the day to take advantage of the sun and warmth. In addition, farming management practices also affect the farrowing time of sheep. Factors such as feeding density, feed quality and water availability** can all have an impact on sheep reproduction. If the feeding environment is poor or poorly managed, it can lead to a decline in the health of the ewes, which can affect the farrowing time. 
In conclusion, while most sheep give birth during the day, some sheep may also choose to give birth at night due to a variety of factors such as genetics, environment, health status, and nutritional status. In order to improve reproductive efficiency and the survival rate of young lambs, farmers should pay attention to feeding management, environmental control and health monitoring. By creating the right environment and management conditions, you can promote a smooth farrowing of ewes and ensure the healthy growth of young lambs.