first off. Hello everyone, and i hope your day so far is well :),

so im in the first week of breeding rats in a seven tub rack system.
i am still in the learning phase with these animals. i got the rats i have now included when i bought the rack.
i had a left over mouse pink from my snakes that had not been eaten so i placed it in my rat tub because i didnt want to kill it myself.
i had figured the rats would eat it honestly. none of the 1.3 rats i had in there have a litter right now. yet one of the females is always next to it. its four days later
and its STILL ALIVE! now i thought cuz it was a mouse they wouldn't want it plus i figured the male would eat it....guys im stumped how is this thing still alive lol?