My clients are always amazed when I am visiting their home for lunch and I put my plate on the floor in front of their dog. I have yet to lose my lunch and I believe this is basic manners for every family dog. Mostly we just don't know how to ask or communicate to our dog that you just don't touch my stuff without an invitation. Any of these three dogs; Cinco, Rogue or Sailor would have been happy to eat some of my fries if I gave them a release to do so. And I could have told Sailor to get it and asked Cinco and Rogue to stay back, leave it.
Teaching some simple leave it can make life a little easier with your pup.