Wyoming producer Roger Huckfeldt speaks for just about anybody who has penned cattle within a fly’s reach of the house: “It seemed like a never-ending process, spraying every two weeks to keep the population down.”

Since trying CRYSTALYX^® Brand ROLYX^® Supplements, which continuously control flies by killing the larvae in manure, the difference shows.

“We didn’t have a fly problem. Period. We didn’t have to spray up around the corrals for flies at all last year.”

The key to success, he advises, is to put the product out early, before flies emerge, and don’t waver throughout the season.