Does anyone know why it's hard to adopt dogs from sites like Petfinder?

[Wicked Blue]

Our family has finally gotten to the stage that we can bear to think about getting a dog to replace our sweet Penny, who passed in January.

My daughter has applied for close to a dozen dogs. Most of the time nobody bothers to respond. Or the dog has been adopted but nobody bothers to notify the website.

For one place, she submitted all the information on the application, spoke to someone who interviewed her and then was told at the end of the conversation that someone else was meeting the dog that night. Why did they waste her time?

Another place told her they would not let us adopt from them because they require a fenced yard.

One place wanted an enormous amount of information including the names, addresses and phone numbers of personal references, and then tried to talk her into a different dog. My daughter is uncomfortable about them still having all this information, especially her references.

We have a rescue dog, a corgi-chihuahua mix, that she adopted about 7 years ago with none of the problems we're seeing this time.