We strongly recommend using heartworm preventative year-round in this area. Heartworm is transmitted by mosquitoes and is not uncommon here. It is expensive to treat a dog with heartworm and it can be dangerous. It's a lot easier and cheaper to prevent it than to treat it.
Most of us know that chocolate can be toxic to dogs. Other foods include onions, grapes and raisins, fruit pits and seeds, macadamia nuts, walnuts, potato peels, green parts of potatoes or tomatoes, broccoli (large quantities), yeast dough, alcoholic beverages, persimmons, human vitamins, raw eggs/fish (salmonella), salt, baking soda, baking powder, mushrooms, sugar free foods containing Xylitol, nutmeg, avocado, mustard seeds, and caffeinated tea. Bones can splinter and become lodged in the dog's throat, or cause damage to the intestinal tract. Chicken bones are the worst offenders. Dogs should stick to dog food.