title: Letter to the Editor.
authors.affiliation: Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden. anna.hillstrom@slu.se.
authors.forename: Anna
authors.initials: A
authors.lastname: Hillström
authors.affiliation: University Animal Hospital, Swedish University of Agricultural Sciences, Uppsala, Sweden. harold.tvedten@slu.se.
authors.forename: Harold
authors.initials: H
authors.lastname: Tvedten