Like most things in Star Wars, no, porgs aren't real creatures. However, they are heavily based on the puffins that inhabit Skellig Michael, the island off the coast of Ireland where Ahch-To is set. Having a puffin as a pet is very illegal. However, you can often see them at some of America's largest zoos, including Central Park Zoo (New York) and Aquarium of the Pacific (Long Beach, California). Alternatively, you could consider getting hold of an animatronic porg from Amazon to satisfy your porg fever.