Last night when I went to feed my female normal( not sure if it helps but she is 968g) I went to feed her and when I put the rat up to her I saw something about 2/3rd the way down her body. It looked as tho it was her heart beating like you see on cartoons where it jumps out of there chest( but it was no where near where I would assume the chest area to be. It was about the thickness of half a pencil and jumped out like 3 times in like a 2-3 second time frame. It jumped out about 1/8th an in. But ever since, I have yet to see this again. Has this ever happened to anyones bp before, or do you know what it is?( oh yeah, and yes she ate fine)