Sheep Ranchers Claim Paying Minimum Wage to Workers Would Put them Out of Business.

Domestic sheep carry disease dangerous to bighorns and humans
This is an important article :
In Loneliness, Immigrants Tend the Flock – The New York Times
* Also, check out Captive Labor.
Environmental Costs
Domestic sheep ranching on public land is subsidized in many ways – environmental costs associated with the activity are largely covered by you and I – our tax dollars to slaughter predators that feed on untended sheep, blade otherwise unnecessary roads, build fences, abate weeds etc; Our public lands leased at remarkably below market value, our bighorn sheep herds decimated by disease spread from domestic to wild sheep, our stream-waters rendered undrinkable, our public landscapes denuded precluding/depreciating habitat that might otherwise support untold numbers of wildlife – including big-game.
There are also the direct subsidies collected by sheepman – millions of tax-dollars for wool and other Ag subsidies. But despite all of the ways that you and I prop up this destructive use of public land, their industry groups continue to maintain that if held to the same environmental and fair-market standard as nearly any other industry – even minimum wage for workers – they’ll go under.