Ok guys i need help. I have 2 seperate litters right now. One looks to be about 4 weeks old and the other is 3 weeks. There is only 2 from each litter left(lost one to fks night before last in the 3 week old batch) so there seems to be 1 from each litter that is thriving and gaining good weight. One of the 3 week olds weights 204 grams and then ine from the 4 week old 198 grams. But the other 2 have been staying at the same weight or losing a little the 3 week old weights 169g and the 4 week old weights 173g and neither seem to want to eat really. The little boy(3 week old)was really interested in food till about a day ago and now hea kind of refusing it. And same with the little girl(4 week old) i need help on getting them to gain weight. Please.