IL4 and pyometritis: 2007). This finding is also supported by studies conducted in dogs. Hence, it has been reported that elevated IL‐4 levels might serve as an early indicator of pyometra and determine the severity of the disease in female dogs (Maciel et al. 2014). Consistent with the research conducted by Maciel et al. (2014), in our investigation, IL‐4 concentrations could be used to measure the severity of pyometra in cats.