Absolutely agree. My latest adopted dog came from being abandoned in an empty building and then transported for about 12 hours to my state. She was terrified of people (but loved dogs!) and spent 3 days under our bed. We put a dog bed, food and water there, and she had a nice “cave.” We would sit at a distance and talk to her, then eventually she would sniff our hand, etc. After 3 days, she felt safe and started coming out. She still dislikes strangers months later, but is the sweetest dog to us.

This is her (Sunny):