Skipping the standard nuts and fruit diet mine like:
-Rose petals
-Sweet drinks (tea/squash/anything sugary)
-Cereal (favourites are the ones covered in sugar/honey)
They also love their mineral lick and salt lick

They like drinking their water like tequila (i.e. followed straight after with the salt lick

)
They arn't intentionally given the 'human' food and drink, they've just become very good theives!