Thank you for your response. I reviewed the article on l’an interprétation, what would be the medical term for « immature white blood cells »? I will ask the vet about serum almapoid a. Finally, I didn’t find info about a fever related to the outdoors temperature/hear. Could that be related to cushings since he is an old horse and have nothing to do with the findings on the wbc? Could he just have been trouble regulating his temperature with the heat wave and big winter coat?