9 CFR §3.167

1. (a)Any person subject to the Animal Welfare regulations (this part and parts 1 and 2 of this subchapter) who moves (including loading and unloading) live birds within, to, or from the animal holding area of a terminal facility or a primary conveyance must do so as quickly and efficiently as possible and must provide the following during movement of the live birds:
   1. (1)Shelter from sunlight and extreme heat. Sufficient shade shall be provided to protect the live birds from the direct rays of the sun.
   2. (2)Shelter from rain and snow. Sufficient protection shall be provided to allow the live birds the option to remain dry during rain, snow, and other precipitation.
   3. (3)Climatic and environmental conditions. Climatic and environmental conditions during movement shall be maintained in accordance with the requirements of § 3.168.
2. (b)Any person handling a primary enclosure containing a live bird must use care and must avoid causing physical harm or distress to the bird.
3. (c)A primary enclosure containing a live bird must not be tossed, dropped, or tilted, and must not be stacked in a manner which may reasonably be expected to result in its falling.