Mexico City - The pet at the end of the leash is tiny, chubby and wears a little sweater as it is paraded down a Mexico City street by its owner. But look closer: this is no poodle or chihuahua, it's a mini-pig, the new pet craze in the capital, where growing numbers are opting for porcine companions over canines."We're a bit crazy in our family," said Tania Loaeza, a housewife who has owned her pint-sized pig for a month."I saw Vietnamese little pigs at a farm and I fell in love with one. I said 'I want one, I want one!' And then Miku arrived," Loaeza said.Miku is part of the family now, running, squealing and playing with her son."She's like a little sister," Loaeza said. And contrary to what one may expect, "she's house-trained and warns my husband when she needs to go out."Mini-pigs have been adopted as pets in other parts of the world, but they are a new sight in Latin America and Mexico, where they have become a status symbol, selling for as much as $1 800.Seeing pigs as pets comes as a surprise in a country better known for its love affair with pigs as comestibles, as pork rinds (chicharron) or tacos filled with spit-roasted meat.Xhantal Bobadilla, a veterinarian, began a mini-pig breeding business after getting one for herself and noticing their popularity. "People have a pleasant reaction when they see a mini-pig," Bobadilla said as a tiny black creature in a pink tutu curled up in her lap during a cold morning at a park while dogs sniffed suspiciously at her second porcine pet.With two females and a male, Bobadilla and her business partner Daniel Munoz have raised 12 pigs.Ten have been sold and they have requests from around Latin America through their Facebook page, MiniPigs DF, the initials for the capital's federal district."I saw that Paris Hilton had one, so that's why I decided to get a mini-pig," said Diana Mendez, as she walked her dog in the wealthy Polanco district.Pricy fashionJose Alanis, a veterinarian and mini-pig expert, estimates that there are 3,000 of the diminutive companions in Mexico, including 2 000 in the capital of 20 million people."They have become fashionable through social media and socialites like Paris Hilton," Alanis said.They sell for between $360 and $1 800. The pink ones are the most in demand, she said.Mini-pigs are the result of selective breeding that began a half-century ago, mixing small specimens from Vietnam and Europe to use them for lab experiments because some of their genes are similar to those of humans.Mini-pigs weigh less than 40kg."Working with big, heavy animals was not functional," said Alanis, who used to raise mini-pigs for biomedical research. "And now they've gone from the farm to the home," he said. "It's a trend that's on the rise. It will stabilise and then decline, but it won't disappear."Loved or lunchBobadilla helps her clients learn how to care for mini-pigs and understand the ways they communicate and act."When it gets cold, they go behind the fridge because of the heat that comes out of the back of the appliance," she said."The first thing they identify is the kitchen. They're always hungry. They ask for food with the classic 'oink oink,' but if you ignore them, they squeal," she said."They're shy because in nature they're prey. But they're not too dependent. You can leave them alone and, unlike dogs, they won't suffer and wait for you behind the door."For her partner Munoz, mini-pigs are smarter than dogs."They're clean, they don't smell bad because they don't have sweat glands. And since they're hypoallergenic, people with allergies can live with them," he said.Alanis said it usually takes 18 months for somebody to determine whether they are happy having a mini-pig.And if they are not? The vet admits she once heard of a mini-pig coming to a sticky end after animal control officers found it abandoned in the capital. "Nobody claimed it and, you know, it ended up in a pot," they told him.