I haven't been able to post, as Lynettea has been either using the computer or out and busy, so I have had time to think.
I caught another rat for her, but when I brought it in and had it on the rug near the computer for a bit of a game before supper, Lynettea didn't like it at all. Unfortunately the rat ran under the shelves, while I was distracted by her shrieking. I couldn't get it to come out and the shelves were too low to get under. My paws couldn't reach very far, although I tried my best.
Then Lynettea said we had to go to bed. She opened the back door of the house and made me go into the bedroom. Then she shut the bedroom door with both of us inside and blocked off the crack under the door. I suppose she thought the rat might try to get in to look at us while we were asleep.
In the morning the rat had gone. Maybe it ran up the hall in the middle of the night and out into the yard.
All very disheartening. No thanks for my efforts, as usual.