My mouse died yesterday at the vet. She had a heart attack. Apparently her liver was also about three times the size it should have been. The vet said little animals instinctively don't show when their really sick because in the wild showing weakness would mean they would get eaten and that's why she only started showing problems yesterday when it was too late to be able to do anything.

I haven't cried this hard in a really long time. :[

I'm completely crushed.

I had just bought her a little friend too.