Thank you. I thought the rat had bit him while feeding when I saw some blood on his heat pit. But it seems it was rat blood or something. So I took to the emergency vet in Ann Arbor.
I live in an apartment complex where there is no covered parking. I am not good with cars, so taking it apart myself would be questionable.
As you suggested, I am going to put a hot water bag and his personal hide on the floorboard. And I will go to Petco to get a mouse if that lures him out.
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