Last weekend, 110 homeless dogs and a cat were flown five hours from Oklahoma. They were coming to Portland, where pets find homes. The Oregon Humane Society in Northeast Portland—now celebrating its 150th anniversary—adopts out pretty much all pets that land there, with no risk they'll be put to sleep after a set time. We adopt so many pets we're a net importer, bringing in more than 7,000 pets from shelters all over the country. And those are adopted, too.

"On average, dogs and cats are adopted in under a week," says OHS spokeswoman Laura Klink. "Guinea pigs, gerbils, bunnies, rats—we've got great adoption rates."