Q. My puppy ate a used 3.5 cm firecracker I think ( 5-6 months west highland terrier )
DR. CHRISTIE LONG, D.V.M., C.V.A.
A. Hopefully this was just a small (2 inches or so) paper canister of the firecracker. There might be some concerns with toxicity from the explosive powder inside if the firecracker had not been discharged already, but I think we're probably in the clear for that since it was already used. Should only contain traces of those substances. Watch for any GI upset - vomiting, diarrhea - and consult your vet if you see this. I think the firecracker itself, if it was only paper, should pass through his system just fine, but monitor him closely for the next 24 hours.