Having a fear of rats is completely normal... but perhaps not if you are a cat.<br>A hilarious video filmed in Tianjin in northeastern China shows a terrified moggy being chased by a rat.<br>The rodent scurries towards the cat as the cat runs sideways in fear.<br>It is chased round in a circle as it desperately tries to leap away from the rat.<br>The feline leaps up on the pavement in the hopes of escaping but the critter is nothing if not perseverant.<br>Comically - for the audience, not so much the cat - the moggy kicks up its hind legs in an attempt to avoid contact, before the video ends.<br>To be fair to the cat, it is only relatively small itself and the rodent is both sizable and speedy, but it certainly doesn't have a career in successful rat catching any time soon.<br>Mice are the standard prey for cats as their small size limits the possibility of counterattack, whereas rats live up the the phrase 'fight like a cornered rat' and can deliver a painful bite when they fight back.<br>Natural born hunters, cats also sometimes attack birds and rabbits.<br>Unlike most animals, felines are in fact 'obligatory carnivores', according to biologists, as they require meat to boost their taurine levels, without which they cannot live.<br>Taurine is an essential amino-acid - one of the building blocks of proteins. Cats' bodies do not produce enough for survival without feeding.<br>Interestingly it has been found that rather than hungry cats make the best pest controllers, it is in fact the well-fed moggies who make the best hunters, as many farmers have discovered.