Nutrition and grazing management can help control brown stomach worms in pasture cattle, according to Texas A&M Extension veterinarian Floron Faries. Low protein intake in particular, he says, contributes to an animal's susceptibility to infection. During the spring months, cattle become infected by grazing pastures containing overwintering larvae. Protein supplements during the winter and into spring can limit the degree of infection and subsequent egg shedding. Maintaining soil fertility in pastures, based on soil tests, also helps keep nutrition at levels needed to resist infection.

Larvae swallowed during the early summer and inhibited in cattle's stomach linings will emerge and develop into adults in the fall if immunity drops off due to protein deficiencies. Supplementation during late summer and fall builds immunity and interferes with the emergence of inhibited larvae.

Overgrazing pastures contributes to worm infections in several ways. First, cattle on overgrazed pastures are less likely to have adequate nutrition, making them more susceptible to infection. Secondly, the concentration of manure increases exposure. Rotational grazing practices can dramatically reduce exposure. When cattle graze a paddock for a week or less, then rotate to another paddock, they are gone before worm eggs in fresh manure have time to hatch. Resting that paddock for at least three weeks before grazing again allows most eggs to hatch and the larvae die from exposure in the absence of host cattle.