You need to get him to a vet. Your chinchilla may have just ate RODENT poison - a poison that is specifically designed to kill animals like your chin. Even dogs die every year from this. D-con causes the blood to not coagulate, basically causing the animal to bleed out and hemorrhage to death. He needs to get an injection of a large amount of vitamin K, not just a tablet. This treatment lasts several weeks to months as D-con has a drawn out period of causing the anticoagulation. There is nothing you can do, he needs immediate vet attention. And if he already starts hemorrhaging, it will be to late for anyone to save him. They can hemmorhage into the chest cavity causing difficult breathing and bleeding from the nose/mouth, into the skin, in the abdomen, and it can cause nervous system dysfunction. This can take anywhere from a few minutes, to a couple days, to weeks.