Skinandvein, I have never had a chinchilla, but yes, they can eat veggies and fruits. Since I have never had any actual experience with them, I am not sure what specific types or anything exactly.
For dogs, of course, chocolate is NEVER good for dogs and you should never feed your dog(s) anything that has chocolate on it or that is made with chocolate. Dogs usually just have dog food (or my dog does

), and sometimes when we are making guinea pigs veggies we will give her a piece of a pepper or something. Hope this helps some...