Funding for this research was provided by:
NKFI-6 (K 128 177)
Croatian Science Foundation grant (IP-2018-01-7317)
Received: 24 November 2019
Accepted: 26 June 2020
First Online: 8 July 2020
Ethics approval and consent to participate
: Animal Care and Use Committee approval was not obtained for this study, because analyses were carried out on existing data obtained under standard farm management. The records analysed were controlled by the head of the experimental farm of the Kaposvár University between 1992 and 2017.
: All authors read and approved the final manuscript.
: The authors declare that they have no competing interests.