About level teaspoon per meal. Other foods that are great are raw honey and dried fruits as treats. All meals should be served at room temperature. Never give frozen bones, make sure they are completely defrosted. It is really quite simple when you get into the swing of things.
Lets start with a mush meal.
Mix well and serve. Vary the ingredients over the week to include eggs, cottage cheese, offal etc. We feed our adult dogs once a day. We alternate their meals by one day feeding the mush meal and the next feeding just raw meaty bones. The bones meal is convenient for weekends when activities inhibit food preparation.