You will find that a number of mission agencies operate farms or send personnel to farming areas to show nationals better patterns of agriculture and animal husbandry. Two entities come to mind: World Concern
http://www.worldconcern.org and Food for the Hungry
http://www.fh.org
I would also strongly urge you to consider coming to the Urbana Convention. There you will be able to ask your questions to a incredibly large number of agencies, large and small, about your particular interest in animals.
Editor\'s note: also browse
http://www.mfinder.org > Veterinary for links online to agencies.
Also contact Christian Veterinary Mission: www.cvmusa.org.
Finally, read the amazing story of Dr Tracey Goen: www.christianitytoday.com/ct/2005/november/31.82.html.
At most national veterinary meetings i.e. CVM (Christian Veterinary Missions will have a booth set up. Contact through www.cvmusa.org.