[header] How to protect your dog at a backyard barbecue [title] Ask guests to keep food away from your dog. [step] Keeping inappropriate food away from your dog may depend on other people following the rules. Ask guests to keep plates out of reach of your dog and to not feed the dog any of their food on purpose. 
[substeps] If you tell them the damage it could do to your dog's system, they should respect your request and follow the rules. If you are still worried about guests feeding your dog, put out a dog-safe treat they can feed it.