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Article History

Received: 9 September 2017

Accepted: 27 February 2018

First Online: 5 March 2018

Ethics approval

: This study was not submitted for ethics committee review because it is a retrospective analysis of medical records of the Clinic of Ruminants, Vetsuisse Faculty, University of Zurich.

: All owners signed a consent form allowing us to use the animals and all the associated medical data for scientific analysis and publication.

: The authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.