I had this black rat that came from a girl who had her rats as pets. She was one of three that I got. The second and third of the group are doing fine.
But this rat died. I thought she was pregnant at first. She was very bloated and actually felt a little warm to the touch. She was in her cage, straining, and rbeathing heavily. I left for the day, assuming she would give birth like her sister did. Instead, she was dead when I got home. She had a bit of red stuff oozing from her birth canal.
Why do you think she died? Could the babies have been impacted in there or something? I really think she was pregnant; she felt kind of "lumpy" like all my other prego rats have felt.
If it is any consolation, her sister had 8 healthy pups. I am debating whether to use them as feeders, or get a few more unrelateds and breed more. There is a huge demand for rats as feeders in this area.

Ratata and her babies: