If your dog is already showing symptoms of poisoning, do not try to treat them at home. (petconsider.com)
Initial symptoms of poisoning include vomiting, diarrhea, and general lethargy. (huskypuppiesinfo.com)
Symptoms of poisoning in pets can include vomiting, diarrhea, drooling, breathing changes, seizures, loss of balance / trouble walking, weakness, collapse, or behavioral changes. (petpoisonhelpline.com)