**Author details**

Kania Bogdan Feliks1\* and Danuta Wrońska2

\*Address all correspondence to: bkania@ur.krakow.pl

1 Veterinary Institute, University Center for Veterinary Medicine Jagiellonian University& Agricultural University, Hugon Kołłątaj Agricultural University in Cracow, Al Mickiewicza Cracow, Poland

2 Department of Physiology and Endocrinology of Animals, Faculty of Animal Science, Hugon Kołłątaj Agricultural University in Cracow, Al. Mickiewicza Cracow, Poland
