The Claim

In newly received feedlot cattle, diets with higher energy density (1.10–1.30 Mcal NEg/kg DM) and lower roughage content are associated with increased average daily gain and dry matter intake, and with a numerically higher incidence of morbidity, potentially due to subacute ruminal acidosis presenting with bovine respiratory disease-like symptoms, resulting in a trade-off between performance and health outcomes.

Source: Energy and roughage levels in cattle receiving diets and impacts on health, performance, and immune responses1.

What the research says

Roughly balanced

Support and challenge are close. The picture may shift as more studies come in.

Supports
2score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Correlation
1 study reviewed
In plain English

Feedlot cattle fed high-energy, low-roughage diets show higher weight gain and feed intake but also higher rates of illness, likely because the diet causes ruminal acidosis that mimics respiratory disease symptoms.

See the scientific wording

In newly received feedlot cattle, diets with higher energy density (1.10–1.30 Mcal NEg/kg DM) and lower roughage content are associated with improved average daily gain and dry matter intake, but also with a numerically higher incidence of morbidity, likely due to subacute ruminal acidosis mimicking bovine respiratory disease symptoms, creating a trade-off between performance and health outcomes.

Why this might work

When cattle eat diets high in grain and low in hay, bacteria in their stomachs ferment the starch too quickly, making too much acid. This acid damages the stomach lining, letting toxins leak into the blood. The toxins trigger widespread inflammation, which makes the animal act sick like it has a lung infection, even though the problem is in the stomach. The inflammation also tells the brain to stop eating, reducing food intake despite the diet being energy-rich.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Energy and roughage levels in cattle receiving diets and impacts on health, performance, and immune responses1.

    When new cattle are fed lots of grain and little hay, they grow faster and eat more, but they also get sicker—because the grain makes their stomachs too acidic, and that sickness looks just like a lung infection. So farmers might give them antibiotics when they really just need a better diet.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.