'But it's a dreadful situation. The butchers want tough meat so they terrorize the cats in the belief it will flood them with adrenaline.
'Cats are space sensitive, so they throw them all in the death cages and kill them outside then lay the carcasses on top.'
Ms Brown said some of these cats are house pets taken from the streets by snatchers, adding: 'You can hear how terrified they are.'
Specialty restaurants that serve cat meat - a delicacy in the south east Asian country - are booming, with dishes fetching between £43 and £57 (1.36 to 1.82 million Vietnamese Dong).
Reports suggest Vietnam banned cat restaurants in 1997 during a rat plague but Ms Brown says the industry has thrived despite the law.
She claimed 'little tiger' meat is so popular, many of the cats are smuggled in tightly-packed trucks from neighbouring China and Laos to fuel the demand.
But there are health risks involved with consuming the meat, she said, as it is sometimes sourced from stray cats.
However, she says said this is not enough to stop opportunistic tourists from trying the meat in search of an exotic traveller's tale.
'Despite this, I am still coming across foreigners with a 'when in Rome attitude' to trying it out.
'This is all the more reason to help the animal rescue teams and raise awareness.'
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