I have used it before when my dogs were ill with upset stomachs, my vet had told me to give it to them, my Pug and Terrier. He told me to give them 1/2 teaspoon, but for a Chi I would say 1/4 of a teaspoon, morning and one at night. You could start with 1/8 teaspoon, if that is not helping go to the 1/4.I have not idea how much your puppy weighs, it won't hurt him. Also I would try him on some unsalted chicken broth. Go luck I hope this little one pulls through. I guess he had it when you got him.
Ike born 8/15/12
Holly born 8/2/13