Do airlines have freezers? In the latest twist to the case of the dead rabbit, an anonymous "airport worker" has told a reporter that it was killed by leaving it in a  freezer locker, contradicting the accounts of United executives who have claimed the rabbit was well treated. United also hastily incinerated the body without the owner's permission, preventing any kind of autopsy from occurring. This all happened apparently at Chicago O'Hare.

My question is why an airline would have a freezer at all, and why would they be putting luggage or pets into said freezers. I mean when I make connections I kind of assume they are not putting my bags in a freezer. Do airlines have freezers?
(Source) Cool room in a cargo terminal.


  The rabbit arrived fine but there was some sort of mistake and he was locked inside a freezer overnight.


Goods that are perishable and human remains awaiting transport, wait in the freezer before being loaded onto flights.

Different rooms for cargo handling can be seen here, they include:


Cool rooms
Freezer rooms
Warm rooms (for e.g. perishable flowers)
Dangerous goods rooms


There are also specialized ULD's that come with refrigeration units.

(Source) Temperature controlled ULD.


  [Depending] on the nature of the goods to be transported, [ULD's] may have built-in refrigeration units.