Now if they were my rats I'd just call them and they'd come running to mummy. (pet ratties

)LOL
I can relate to Rat Volleyball. When we lived in town, the rats moved in the house. And every night they'd go out foraging and bring home Macadamia nuts to their nests. They would climb up the stud inside the wall, drop the nut down, pick it up again, climb to the top of the next stud, drop the nut down. etc etc etc. You could follow their progress by the sound of the nut dropping. Finally they get to their nest in a wall cavity in the bathroom, right next to my bedroom. There to gnaw through the shell of the nut for the rest of the night.

Because we had cats, dogs and kids, we didn't poison. We set rat traps along the beams in the back verandah where they traversed. ( look for the rat poop to find where they travel.)