Thermotolerance of Broiler Chicks Ingesting Dietary Betaine and/or Creatine.The present study aimed to assess the effect of dietary betaine (B) and/or creatine (C) on performance and thermoregulatory responses of broiler chicks.  Indian River broiler chicks, fitted with compact thermosensors, were reared to market age (five weeks).  Compared to the CONT, dietary supplements alleviated hyperthermia responses, with B alone being more efficient than C or COMB treatments.  The mitigation of hyperthermia is likely mediated by enhancement of water balance indicators.  Although not efficient in improving growth performance, dietary B and/or C are efficient in improving thermophysiological performance and survival of finishing broiler chicks under A-HS.
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