ConclusionsIn the current experiment, there was a dose-associatedeffect of propolis on the improvement of broilers’ behav-ioral patterns following heat stress. The results revealedthat 100 mg kg−1propolis only significantly increasedwalking activity; 250 mg kg−1propolis increased both thestanding and walking activities but reduced the pantingbehaviors; while, 3000 mg kg−1propolis increased walk-ing activities but reduced panting behaviors. It is possiblethat the concentrations of propolis and the timing or dura-tion of treatment applied in this study were not optimalto change all behavioral responses related to coping withhigh environmental temperature challenges. Adjusting ofthe dose of propolis, birds’ age and the duration of the sup-plementation should been further tested.