Keep close track of what is going in. Reread the page on handfeeding in Guinea Lynx (click on button above and go to Hand Feeding). Make sure your pet is getting enough food. If not enough is going in, there will be few poops, but there will be some.
If he has a blockage then you MUST get him to a vet for Reglan.
Is he gaining weight? If you are feeding him and he isn´t pooping then he has to be gaining weight. Unexplained weight gain is not a good sign either.