One of the pillars of the health condition of cattle is the colostrum administration to calves. Maybe, owing to the vets? hectic labor, we tend to think that it?s a routine activity, similar in all cases. The guidebook we present aims at highlighting that not all colostrums are equal. Each case must be studied in depth, in order to convey the adequate passive immunity the neonatal calf needs. The book is presented in an effective and easy-to-read way, and offers answers to the questions which can out this task.