Here is my personal "short list" of beneficial food items you can add to your dog's diet to provide natural sources of vitamins, minerals and other nutrients.

Vitamins:

• Vitamin C: green leafy vegetables, carrots, berries, tomatoes etc.
• B vitamin complex: liver, nutritional yeast
• Biotin: beef liver, nutritional yeast, cheese, eggs, chicken breast meat, salmon
• Choline: egg yolks, beef, wheat germ, oats
• Inositol: wheat germ, nutritional yeast, liver, brown rice, oats, vegetables
• Vitamin A/beta carotene: cod liver oil, liver, egg-yolk, carrots, dark green leafy vegetables, yellow/orange fruits
• Vitamin D: exposure to sunlight, cod liver oil, fatty fish, liver, egg yolk, dark leafy vegetables
• Vitamin E: whole grains, wheat germ and wheat germ oil, avocado, beef, seafood, apples, carrots, celery
• Vitamin K: leafy vegetables, cheese, liver, also produced by the bacteria in the healthy intestinal tract

Minerals:

• Calcium: dairy products, blackstrap molasses, fish, ground eggshells
• Chloride: kelp, tomatoes, celery
• Magnesium: dairy products, fish, meat and seafood, apples, blackstrap molasses, avocados, bananas, dark leafy vegetables, whole grains
• Phosphorus: meat, poultry, fish, eggs, bones
• most dogs get too much instead of too little, often resulting in kidney damage
• Potassium: fruit, vegetables,whole grains, blackstrap molasses, fish
• Sodium: present in many foods, also best avoided in high amounts
• Sulfur: eggs, garlic, lettuce, cabbage

Trace Elements:

• Boron: honey, fresh fruit, green leafy vegetables
• Chromium: eggs, beef, whole grains, nutritional yeast, blackstrap molasses
• Cobalt: vegetables
• Copper: whole grain, liver, blackstrap molasses
• Iodine: eggs, seafood, kelp and other seaweed
• Iron: meat, poultry, fish, grains, fruits, vegetables
• Manganese: avocados, eggs, brown rice, whole grains, leafy greens
• Molybdenum: spinach, liver, whole grains, dark green leafy vegetables
• Selenium: whole grains
• Silicon: oats, alfalfa, leafy green vegetables, whole grains
• Zinc: muscle meat, poultry, seafood, grains, eggs, seeds, nutritional yeast