Magnesium is an important mineral for canine health because it helps the body absorb vitamin A, vitamin C, potassium and sodium. Magnesium is necessary for proper canine bone growth and absorption of proteins. According to Pet Education.com, the symptoms of magnesium deficiency in dogs include depression, irritability and tremors. Add magnesium to a dog's diet by giving them certain types of foods and magnesium supplements.
Read the nutritional information on your dog's bag of food if the animal suffers from a magnesium deficiency. According to Pet Education.com, adult dogfood ought to contain at least .04 per cent magnesium. This should be indicated on the nutrition label. If the percentage is below that, you may need to add magnesium to your dog's diet.
Give dietary supplements that contain magnesium if it exhibiting signs of a deficiency. The deficiency should first be confirmed by a veterinarian.
Add raw whole grains, milk, raw soybeans, oil-rich seeds or nuts and green vegetables to your dog's diet. This might eliminate the need for additional supplements. Be sure to consult with a veterinarian before feeding these foods to your dog.