Katherine Heigl loves adopting!

The Grey's Anatomy star, Katherine Heigl loves to adopt! Puppies that is. She recently joked to US Weekly that her husband had no idea he was marrying into a five-dog household. The best part is Katherine is totally savvy when it comes to adoption. She knows the horror of puppy mills.

"In the last eight years, I have suddenly started to realize how great the need is for animal rescue," she says. "It would break your heart to hear the stories. It makes you feel like there are no other options than to rescue from shelters because most of them are kill shelters."

We hope people will listen to Katherine next time they want to pick up another dog. Adoption is key!

"I do understand people going to breeders, but what you cannot do is get a dog from a puppy mill," she says. "Never buy a dog from a pet store because it's promoting puppy mills, and they treat their puppies atrociously."

Want to help out? Here's some more info on puppy mills.