Received: 2 October 2019
Accepted: 22 April 2020
First Online: 18 May 2020
Ethics approval and consent to participate
: Permission from the Experimental Poultry Center (EPC) and Animal Sciences Unit of the Flanders Research Institute for Agriculture, Fisheries and Food (ILVO) was obtained.
: Not applicable.
: The authors declare that they have no competing interests.