The story is in the headline, but here's some more details from the UK Guardian :
Few pigs turn their snouts up at the chance to roll around in mud. But Cinderella the six-week-old saddleback has adopted a different motto - four wellies good, four trotters bad - after being diagnosed with mysophobia, a fear of dirt.
The piglet's owners, Debbie and Andrew Keeble, who run a farm near Bedale, North Yorkshire, were baffled by her reluctance to hit the mud when she and her siblings were let out into the fields. "When the batch ventured away from their mother, Cinders just stood at the edge of her sty shaking while the others explored," said Debbie.
Andrew, 42, said: "We scratched our heads a bit but then we thought, we wouldn't go in the mud bare-footed, so why not try some wellies?" The couple asked a designer friend come up with a bespoke pair of piggy boots. Cinderella's green wellies are made of rubber and have been created with no footwell so that her trotters slip straight in.