Wow. Dogs are blood donors too!

Madeleine, a 7-year-old retired racing greyhound, is one of the regulars at the blood bank. "She's been doing it two or three years," says her owner, Marianne McKiernan, of Denver. "We've been lucky because we've never had a dog face a crisis. But others aren't so lucky. And this is an easy thing for us to do."

Did you know?

"Greyhounds are among the favored breeds when it comes to canine blood donors. Their easy demeanor and short hair make drawing blood a snap. And 95 percent of them have A- blood, the universal blood type for dogs."