Had the same problem with our dog. There is an emergency 24/7 phone number on the D-con package what we have called first. We gave them all the information (breed, weight of dog, how much she ate of the poisson) and in our case they assured us, that the amount was way too small to do any harm. It seems that your puppy ate even less than our dog, so hopefully the puppy will be OK, but first thing I would do is call the D-con emergency line or your local poison center, before putting any other stuff in that poor little doggie. You can actually really make humans or animals sick by giving them salt water or any other home remedies, especially, if the poison has been already absorbed.