Our last rat, Elvira, passed today while I was at work.
I thought she was sleeping when I got home, so I changed her water and let her be. She had been struggling for a while but kept fighting on, though for the past few days she didn't want to be touched. Louis was the one who confirmed she had died.
We won't get anymore, as much as we love having rats as pets, their short lifespan makes it very painful when their time comes. It was a running gag by us and our friends that to call me the Rat King because I would always have all 4 around me at home, so I think I might do something to commemorate this time of my life later.