When it comes to Purolator, Fedex UPS etc. Live packages are not treated much different then any other package is, they don't generally take any extra care for a box that says live, so its possible it can sit outside in an unheated container at an airport waiting for a plane to load it on.
Also once onto the truck for delivery, the truck is only heated to the comfort of the driver and in summer may or may not have a/c.
Airlines typically leave anything living in a heated area until the plane is there and typically loaded close to departure so time spent outside is limited.
I've worked for Fedex and the boxes came too fast to read any labels on them.
I worked at an airport handling West Jet flights and we did take extra care for live animals, making sure they were never exposed to the elements more then needed to get them to/from the plane.
|