If you're hosting a barbecue or a party at your house, remember that lots of common snack foods are poisonous to dogs, including grapes, onions and avocados.
"If you're having lunch at your house, it could be stressful to your dog," Ellis said. The combination of strangers, unfamiliar noises and the commotion of a holiday can be seriously scary for pets. "Keep a close eye on your dog during those barbecues," Ellis said.
3. Plan ahead