Before company comes (or you hit the road), stock up on some special, safe treats for your pets like these Turkey & Cranberry Delights. In that case, if Grandma wants to feed the dog a snack, she can give him a dog treat, not a dangerous turkey bone. Place the appropriate portion in a convenient location and make sure you point out the healthy treats to the humans to let them know that's the supply for the entire day. This not only introduces your rules to newcomers, but also encourages them to pamper your pals with extra
petting or playtime... and not to feed the snacks all at once.

Source