She put bottles of water in the box so the dog wouldn’t get thirsty.
Good thinkin’
Anyway, this story has potentially useful information.
(1) If reincarnation is real, and
(2) I'm reincarnated as a dog, and
(3) My owner tries to mail me somewhere in a box,
I'll know to bark like crazy at the post office so I won't die in the hold of an airplane.