I am sure there are lots of such texts. Jack London's works come to mind, such as Call of the Wild, White Fang, Jerry of the Island, and Michael.
H-Animal aims to serve as an on-line home for scholars across disciplines who are engaged on the study of animals in human culture.
Be sure to check out the new syllabus contributions by Jody Berland, David Herman, Piers Locke, and Michal Pregowski in the Syllabus Exchange!
Logo and design courtesy Lee Tse
A useful place to start would possibly be with Stephen Caunce's book 'Amongst Farm Horses, The Horselads of East Yorkshire', published by Alan Sutton in 1991.
There are some nice first-hand accounts of what it was like to be a 'horselad'.
Donald Hall's "Names of Horses" may be a good poem for your purposes.
University of Iowa
CALL FOR PAPERS – Animal History Group Summer Conference
King’s College London
28-29 June 2018
Keynote speaker: Dolly Jørgensen
Harvard University will again, through its Summer School (www.summer.harvard.edu), offer an online Animal Studies course. The 2018 course is entitled “The Animal-Human Divide.” Registration opens March 1 and closes May 21.