Other animal feed should be kept where the dog can not get to it. In a barn keep poisons out of reach and make sure it doesn't have residual kill if they eat a dead mouse. If there are shelves, washers or dryers that the dog can get on you must have nothing dangerous within reach of the dog if he were to get up on them. If the driveway goes into the dogs fenced area make sure the dog is secure before pulling the car in or out. They do open cupboards.
Garbage is dangerous.
Make sure there are not small objects a dog could chew or swallow and choke. Keep candies out of reach. Chocolate in particular is dangerous. Nuts can be a danger causing bladderstones and walnuts contain a common fungus that can cause seizures in dogs. Garlic and onions can cause hemolytic anemia.