Here is the link to the Table of Contents of a book you might want to locate or order. It can give you a good overview. The book is
Ettinger, S. J., Feldman, E. C., & Cote, E. (2017). Textbook of Veterinary Internal Medicine-eBook. Elsevier health sciences.
Link to the TOC is http://sutlib2.sut.ac.th/sut_contents/H91380_v1-2.pdf
Zachary, J. F., & McGavin, M. D. (Eds.). (2012). Pathologic Basis of Veterinary Disease5: Pathologic Basis of Veterinary Disease. Elsevier Health Sciences.
Link on Amazon is https://www.amazon.com/Pathologic-Veterinary-Disease-Expert-Consult/dp/032335775X
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Now, if you go to that Amazon page, you'll see loads of books listed at the bottom of the page relating to vetrinary care and problems. You can also search on Google Scholar using a variety of terms (veterinary diseases, veterinary care, veterinary problems) and you'll find lots of stuff. Also on Scholar search 'zoonosis'.