Funding for this research was provided by:
Department of Agriculture, Food and the Marine (14/S/832)
Received: 27 March 2019
Accepted: 4 July 2019
First Online: 15 July 2019
: The study received ethical approval from the Teagasc Animal Ethics Committee (TAEC 40/2013).
: Not applicable.
: The authors declare that they have no competing interests.