You need to have him checked for rabies. That will kill him. And may kill you and every other warm-blooded critter in your house.I just went outside to take the trash out. On my way back in, I moved the doormat over and there was a little brown ball of fur under it. I took a good look to find it was a bat. He was alive but, really out of it. I put him in a box and brought him in to warm up. Now I don't know what to do with him. I guess I'll let him out on a warmer day or call the animal shelter.