I'm glad to see you are so diligent and caring. Also glad to see the breeder was so upstanding as to quickly refund you for a snake you are not 100% happy with. I don't know why the breeder isn't being more responsive to you right now, but I think you do not need to worry about the health of the snake or incur any more vet bills. I don't imagine the breeder will incur any vet bills either upon return of the snake. The snake will probably be left undisturbed until it decides to start feeding again. At that point the breeder may choose to do a fecal exam before re-selling just because the animal was out of his collection and control for awhile, but that is his decision. I do not recommend force-feeding or assist-feeding. Most of the weight loss was probably natural emptying of the digestive tract after you received it. It will probably lose weight very slowly from this point on and as others have mentioned, he can go off feed for many more months with little risk of starvation.

It is time for you to relax and stop stressing. Let the snake relax and stop stressing. Send your breeder a reminder e-mail every week or two until he gets around to making arrangements for return of the snake.

-Paul