My only problem with the article is the use of a mortar of clay and horse dung mixed up with strong flaxseed tea to close the bung hole. YUCK!
Llamas are bigger than Alpacas.
We had friends, who raised both and had more aggression problems with the Alpaca mothers.
They sold all of them, when they really got into raising wine grapes. Imagine a herd of Llamas and/or Alpacas getting into a vineyard and going down a line of grapes eating them.
The only thing worse is a big flock of wild turkeys feasting on your grapes.
Right here in Ohio we have the Yellow Butterfly Winery - they also raise alpacas.