The Polish pony is world rare breed of horses kept in natural conditions originated from tarpans, living in the wild. Presented investigations are the attempt of qualification of morphological and biochemical blood serum components of healthy polish ponies and biłgoraj horses kept in half-savage conditions. It seems to be extremly important because of progressive degradation of their natural environment. Primitive horses races breeding becomes popular and a lot of breeders are interested in it because of their wide adaptative possibilities. Delivering the informations from physiology field and about reference values of blood serum parameters (which make the base of healthfulness graduation) belongs to the most significant for the success in preservative breeding process of this in scale of world unique horses' race.

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