Fed ball first rat and I am worried

[Karma]

Ok heres the deal...

I've had my ball for a few weeks. I have fed it 3 times since I had her. One adult mouse every 7 days. I did that 2 times.

I fed her her last mouse on Monday, August 9th. Then I fed her a fuzzy mouse for a snack the next day. I have recently learned that she is big enough to start on rats.

Then I learned it would be ok to fed my ball every 4-5 days. So I fed her a medium rat (I guess you could call it a sub-adult) yesterday. It was about the same size around as the biggest part of my ball's body. She got it down with no problem. And she kept it down.

This is the part that worries me. A few hours later I noticed she was completely submersed except for her head in her water bowl. She stayed that way for several hours. I have never seen her do that before.

Later that night she went back to her hide box where her UTH is.

When I woke up at 12 noon she was back in her water bowl up to her head.

I left for a few hours came home and she was still in there. She might have got out while I was gone.

Is this normal? I always read that Ball's will stay where it is warm to digest their food.

Also her body is huge now after eating that rat. Should I keep her on rats or go back to adult mice?