Some people say that pet rats aren’t like wild rats. What do they have against wild rats? It was wild rats that got me hooked! I used to live in a house that harbored two wild rat colonies, one of Rattus norvegicus, the other being Rattus rattus. I established diplomatic relations with the Rattus norvegicus.
The Norway rats lived between the floorboards of the ground floor and the ceiling of the basement. I lived in the basement. The rats would pass through my living space from time to time, and I would call out to them, making squirrel-like chattering noises. They always took interest.
Once an adolescent rat was so intrigued that she came within 6 feet of me. When she reached a line that she dared not cross, she stretched forward as far as she could, like the difference between a rectangle and a parallelogram.
Several people had stuff stored in the basement, and they all had problems with rat damage. But I established territory, and the rats respected it. I hissed at them whenever they ventured into my stuff, and they came to leave it alone.