I'm sorry to hear that he still hasn't pooped. :-( Most likely it is because of the mouse. They take longer to digest. Try to maintain higher temps (up to 84-85 in the day, 78-79 at night) and humidity (80%). The soil should be moist; proper hydration will help with bowel movements. Because it has been such a long time, if he doesn't have a bowel movement in the next day or two, you should consider going to the vet and getting a laxitive. Impaction can be very serious and possibly life threatening. Don't feed him again until he poops. Continue the warm soaks (water temp of 78-79 degrees) and gently massaging his side where the bump is, starting from the shoulder and gently working back towards the vent. Keep us posted. Hopefully he will go very soon!