Pig breeding, as an independent livestock sector in Russia, has been developing steadily since 2008. This was facilitated by the adoption of the agricultural development program, which assumed an increase in state support for the agro-industrial complex. However, the intensification of pork production places high demands on the quality of livestock, which necessitates the use of breeds, types and lines that can withstand the loads of modern industrial technology without reducing productivity.

The paper presents the results of the study of morphofunctional parameters of platelets in dogs with parvovirus enteritis at different ages. The most strongly expressed change of platelet parameters at parvovirus infection is in puppies aged 2 to 6 months. On the third day of the disease the number of platelets decreases and platelet disaggregation index under the action of ristomycin as well.