You can call whenever you have a question or problem. Finally, most people who get or work with rescue dogs believe that these animals know that they've gotten a second chance and try harder than the average dog to fit in. Next to having a child, getting a dog is one of the most demanding things most people do and there can be problems when people don't realize how big a commitment it is. Many people who believe they know what a dog needs are remembering a childhood pet who was cared for by mom and dad, and during a time when things were simpler. The questions help both the rescuer and the adopter recognize possible problems before they develop.
Some rescuers even require a home visit.
You may feel a bit like a social worker is checking on your children. Don't be offended. These visits are just the last step in assuring that you and the rescuer have covered all the bases. Don't hesitate to ask the reason for a question or to add information. For instance, you may live in an apartment, but near a park where you could take the dog to exercise.