Just saw this- I deleted the other (unanswered) thread since this one has responses.
Also- Feeding 2 mice every 5 days* sounds like you'll be risking a regurgitation, which you really want to avoid. I'd also say feeding every 5 days for an adult snake is not "taking it slow" as your vet suggested. I wouldn't feed more often than every 7-10 days, especially when you're feeding 2 grown mice at a time, and not even feeding only one adult mouse at a time. When a snake is chronically under-fed, it takes time for their body to get up to speed- a starving snake may not have enough digestive enzymes (made from protein in the diet!) to get the job done. A regurge is the last thing this snake needs now, so I agree with your vet- "take it slow".
(*The only time I've fed a snake every 5 days is when it's a young snake that's eating pinkies (mice or rats) because those are very easily digested.)
Good for you to take in this snake- I hope he does well in your hands, &for doing a vet check too. Do keep us updated? Sorry we were slow this morning.