Interpreting bovine hematology is essential for diagnosing, monitoring, and prognosing various diseases. One of the most commonly used diagnostic tool is the complete blood count (CBC), which helps identify a wide range of organ and systemic diseases. The purpose of this review article is to provide veterinarians, especially field veterinarians, with as much useful information as possible, about bovine hematological tests. Bovine complete blood count can be of great assistance in diagnosing, further testing and predicting the prognosis of bovine diseases. However, it should be noted that the diagnosis of bovine diseases based solely on a complete blood count is only occasionally possible. In most cases, a complete blood count in bovine serves as an important adjunctive tool in diagnosing diseases. In this paper, we will focus on the specificities of bovine erythrocytes, leukocytes, and thrombocytes.