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Article History

Received: 29 May 2019

Accepted: 25 September 2019

First Online: 22 October 2019

Ethics approval

: Hair samples from Friesian horses were collected with a written informed consent of the horse’s owner. It was considered that there was no need for an Animal Care and Ethics Committee approval according to the Dutch law after consultation with the Animal Experiment Expert from Wageningen University & Research. The Animal Welfare Officer thought it was not an animal experiment as referred to in the Dutch Act on Animal Experiments. Owners of the Exmoor ponies gave permission for their animals to be used in the study and the study was approved by the Ethics Committee for Animal Experiments in Uppsala, Sweden [Number: C 121/14 and number: 5.8.18–15453/2017]. Sample collection in Belgium was granted under P061/2012 and P096/2011, issued by the Animal Ethical Committee of KU Leuven. The hair samples for Swedish Warmbloods were collected prior to this study for pedigree verification purposes, with consent from the owners to use the samples also in research. The sample collection was in agreement with national legislation and did not require an ethical permit.

: Not applicable.

: The authors declare that they have no competing interests.