Abstract
The aim of the research was to obtain “native” referential values for the indicators of the red and white blood cell systems and platelet indicators in the clinically healthy foals of purebred Arabs and Polish cold-blooded breed, in the period from birth till weaning. The morphological examination was performed ex tempore with help of the automatic haematological analyser. The obtained results demonstrate that the majority of haematological indicators of the red blood cell and white blood cell systems of warm-blooded foals, especially in the first 2-3 months of their life, are statistically higher. It can be assumed that within the indicators of the white blood cell system, the statistically important differences between the groups occur rarely, as do mutual (interfactor) correlative connections or the trends comparable for both groups.