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					Originally Posted by Stella's mom  Thank you for making this thread.  My husband is a airline mechanic and I asked him about cargo hold flying conditions awhile back.   Cargo holds do not have a heat vent and yes you are correct about it being sealed due to chance of fire. Personally I cannot imagine how cold the area could get because I know how cold I've gotten before flying a window seat.
 This is good info for anyone thinking about flying their pets.
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  We talked about this topic again over dinner and he also said there were extreme temperature changes in cargo.  He has opened the cargo door before and the heat would hit you like a furnace, quite a change from the cold at 35,000 ft to the heat generated on the ground.