If he is not pooping, then that explains why he is not eating. When the pooping stops, usually there is a blockage, because there is a blockage, MeeKeeMoo feels like he is full/not hungry. It's a cycle you want to get him out of a.s.a.p. One of the other ladies on the forum had a chin with this problem ... I think it took two whole almonds. When he finally pooped it was a chain about 3 to 3 1/2 inches long. That's allot of poop!
But then, he was all better.
Have you given him any yogurt? (Yogurt was listed in the article I ask you to read. My chins like the strawberry and blueberry the best.) Got to get him on something that will replace the flora in his digestive system.
If he is not drinking, then, he will become dehydrated ... not good. Keep water in him as often as you can get him to drink it. You might try putting some cranberry juice mixed with water (half and half of each). This usually tastes good to a chin and he will take more. Also, it helps to clean the kidneys.
If you have a blender, put a small amount (about one stuffed cup full) of hay in the blender ... grind it up fine (caution: do not remove the lid until it settles). Mix this powdered hay with a small amount of water (add the water a few drops at a time) forming raisin size balls. Offer these to him one at a time. If he will not eat it that way, you may have to add cold water and feed it to him in a syringe. A chinchilla can live on hay and water alone. As a matter of fact, many vets will stop the pellet food and put a chin on hay and water only. (To keep the extra nutrients he needs, I usually use Alfalfa hay instead of Timothy hay when they are sick, pregnant and or nursing.)
If you have, or can get some acidophilus, add a small amount (dump contents of one capsule or 1/4 teaspoon) of that to the hay powder before adding the water to make the hay treats. IF you use the acidophilus, you must refrigerate the unused hay treats in an airtight container. Acidophilus can be found in your health food stores ... once you open the bottle ... keep the bottle of acidophilus refrigerated or it will go bad. If the health food store says they do not have any ... ask for Sensi Dophilus by Natur's Source ... allot of people do not realize this is acidophilus. Any brand will do, but this is one that is most commonly found.
Keep us posted!
Jo Ann