Large-scale cattle feedlots in North America finish millions of cattle annually, with welfare challenges including respiratory disease, lameness and heat stress.
Feedlot cattle are highly susceptible to bovine respiratory complex, which causes fever, depression and painful lung lesions. Metaphylaxis (mass antibiotic treatment on arrival) addresses disease risk but raises antimicrobial resistance concerns. Shade provision is voluntary in most US states, leaving cattle exposed to extreme heat. Lameness from poor hoof care on unpaved surfaces causes chronic pain.