"they burble and chatter, whistle and purr"

This farm in Peru uses 1000 guinea pigs to power their farm and create an income stream (fertilizer) on the side. 

And here is an example of a dairy farm in the US, though I don't think we're planning to have this many cows.

BCS Two-Wheeled Tractor

"Equally comfortable in the forest - shredding branches and hauling out firewood - as it is in open areas tilling soil, removing snow and bailing hay."