Dust in dry feedlot conditions causes significant respiratory welfare problems for cattle and is often overlooked as a management and welfare issue.
Feedlot dust welfare impacts are chronic and cumulative. Respiratory exposure to dust containing bacterial endotoxins and fungi causes subclinical inflammation that progresses to clinical disease in stressed animals. Eye irritation from dust particles causes discomfort and predisposes to infection causing painful conjunctivitis and keratoconjunctivitis. The welfare impact is diffuse and often invisible until clinical disease presents, making it easy to overlook despite affecting large numbers of animals. Dust management through water application, traffic pattern modification, and shelter belt planting reduces welfare impacts but requires investment that is not universally made.