That is easy. Because every dog deserves a chance. There are many reasons to adopt a rescue dog. These dogs are usually beyond the puppy stage. There is usually very little chewing or destructive behavior.
Older dogs can go for more than a few minutes without having to go potty.
This means these dogs can be perfect for busy people who do not have the time to deal with young puppy behaviors. You know what the dog will look like and how big the dog will be when it is grown. Most of all, rescue dogs are usually very grateful for the kindness shown to them. Many of these dogs have lived the rotten side of life and understand when they when they have it good. Rescue dogs have lots of love to give.