|Photo by Hannibal Poenaru|
We know that hissing is intended to deter or see off an aggressor and it is a defensive measure. It is intended to mimic the snake's hiss. This has evolved over eons. It appears that animals recognise that the snake is dangerous otherwise there would be no point in mimicking the snake. You can see the ears starting to flatten too. This is to protect them in an ensuing fight. Cats ears get damaged in fights.
This particular cat could be a purebred. She looks a bit Burmese or Burmilla and she looks clean and cared for indicating a house cat rather than a feral or stray cat.
The teeth and gums are in good condition. She is probably quite young. The eyes sparkle. The picture was taken in France near Paris. The photo is published here under a creative commons license.