Journal of Veterinary Medicine and Animal Health 2141-2529 Academic Journals 10.5897/JVMAH2015.0506 M. Levkut Jr. V. Revajov V. Karaffov A. Laukov R. Herich V. Strompfov Z. evkov R. itan M. Levkutov M. Levkut Sr. * E-mail: viera.revajova@uvlf.sk 2016 31 12 2016 12 07 2016 13 10 2016 8 12 214 222 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/JVMAH/article-abstract/04B5D0D61555 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JVMAH/article-full-text-pdf/04B5D0D61555 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25