Yes, dogs do have dietary needs that need to be taken into account if you are home cooking for them. It's *possible* to meet all of their nutritional requirements with food if you know what you are doing and have excellent guidance. However, there are companies that manufacture supplements specifically for dogs for those who need assistance. Here is a link to a reputable company that is run by board certified veterinary nutritionists:
www.balanceit.com . Please check out the link to the video on the left side of their home page for an explanation of why supplements are a good idea.