One good thing to try would be to change the bedding your using for him. I had a girl go off feed for 6 months although she lost very little weight i was still worried sick. So i tried everything including enviromental changes such as smaller tub different substrates (brown painters paper, paper towels, eco earth, cypress mulch. Also a more secure hide maybe smaller hide or even multiple hides could all help to make your snake feel more secure. another suggestion is if you dont own a scale that can weigh in grams i would look at purchasing one, Got mine from wal-mart for about 15$ i would continue to keep a close eye on his weight if the weight lose gets drastic you might need to look at other options, but for now the most important thing is patience i know its hard to do trust me but eventually he will eat for you again! good luck btw i would love to see some pics of this pied boy!