Many thanks to my Canadian friend Rod for sending this link:
If anyone has any of the following manuals I would like to scan them and post them as a praxis reference.
FM 25-7 Pack Transport (Post World War II)
FM 25-5 (draft) Animal Transport (1961)
FM 3-05.213 (originally FM 31-27) Special Forces Use of Pack Animals, 16 June 2004.