They should be treated just as well as any other animal.
beast of burden
In the Andes the main beast of burden is the llama.
A beast of burden used in the North African desert is a camel.
The beast of burden to Native Americans were dogs.
A donkey carries goods in panniers, it is a beast of burden. The lead singer of the pop group the Animals was Eric Burden. (No extra charge for 2)
beast of burden
Llamas and alpacas are the common beast of burden to Peru and Chile
Camel
Llama
Llamas
camel
The camel is about the only beast of burden that would be capable of providing reliable transportation in a desert.