JQ almost tells the truth, but in a very circular fashion, if you go back to the start of this tread Kremin asked about not carrying animals because the holds are unpressurised, the holds are pressurised but the A320 holds are not heated, therefore they don't carry animals, this decision made when ordering the A320 fleet.
Soooooo, unheated, unpressurised slight technicality, same end result for animals in holds, very stiff on arrival.
That's JQ management thinking, I don't understand why, so I'll just make up something that sounds close.
Bright