Many thanks to Scott Golden for posting this paper on FB. I thought it was something that would be of interest here on the forum as well so I took the liberty of posting it here. Definitely worth the read.
I’m interested to hear Andy’s take on the author’s contention
“Estimating the energy efficiency of animal traction may prove difficult, if notimpossible to do while so many other variables influence the efficiency or
inefficiency of an animal at work.”
http://www.horsepowerinireland.com/uploads/4/0/2/9/4029783/dissertation_on_horse_traction_in_ireland.pdf