if it has a "worm shape look" its probably an undigested worm, so no thats not normal. How are you heating the tank? They need belly heat to properly digest food
Thanks for all the concern.....it just happened 1st day....cause the seller didnt feed the juvie for 2 days...then i feed it too much on the day it came home....around 10~15 medium sized mealworm he ate...he is now fine with normal poop....by the way, the weather is about 32 degree C to 35 degree C in Malaysia here so should not be a problem with heat.