Notes to Brick chapter 16
Livestock Brands
Voskos's registered brand is "a walking I," which would be the letter I with lil' legs on it: http://www.tscrabrands.com/how-to-read.html Whether that is a brand you actually could register these days, I admit I've no idea. And having him use it as a paint brand on sheep is... a bit of a liberty. Modern sheep brands are generally nothing so quaint. But, hey. He is a millennia-old cyclops, after all. Perhaps he's set in his ways.
Sheep Grazing
Everything Voskos says about sheep overgrazing is true: sheep can be astonishingly destructive. However, as you'll also see from the above, it doesn't have to be that way, and grazing can in fact be beneficial if managed properly.
Hence, grazing schedules for public rangelands.
I couldn't find detailed information on how public trustlands grazing works in Utah, and I was writing this back during the government shutdown, so I couldn't write to the Bureau of Land Management (BLM) there to ask. What's portrayed here is instead based on Idaho's system. (Great documentary in the link, if you've got 23 minutes and you like sheep.)
As far as I can tell, there aren't actually public rangelands in Manti-La Sal National Park. But I put Voskos's flock there, anyway, because the scenery looked cool. /priorities