A couple of questions:
Where did you purchase from - pet store or reputable breeder?
Did you see them feeding before purchasing?
If they are skinny / loose skin - where they like this when you got them - it would be very quick for this to appear after just 2 weeks in your possession?
What is the set up they are being kept in (Husbandry) - temps, humidity, cage, tub, hides etc?
Are they in separate enclosures?
A lot of things could be contributing to them refusing to eat, especially if they are still acclimatising to their new home.
Tony