**Author details**

Thomas Rohwedder Small Animal Clinic, Freie University Berlin, Berlin, Germany

\*Address all correspondence to: thomas.rohwedder@fu-berlin.de

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
