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Hourly rumen temperature differs between calves diagnosed and treated at least once for BRD (RCASE) and those never treated (RCON). Rumen temperature was determined from a data logging bolus (Well Cow Limited, Roslin, UK) with hourly means generated by BRD status across the 56 d following feedlot arrival from data logged every 15 min. Effect of BRD, P < 0.01; hour, P < 0.01; and BRD × hour, P < 0.01. *RCASE differs from RCON within hour (P < 0.05).
