Well, I'm happy to say that Foster and Smith got back to me today. One of the Drs. called and we discussed my concerns about their food. She told me that they had changed from using menadione dimethylpyrimidonol bisulfate to menadione sodium bisulfate, citing some German data about the safety of these products. She explained that there are 3 forms of menadione and that one of these forms must be used to get the vitamin k in the product. Supposedly, the form they just switched to is the better of the 3. Their website hasn't been changed to reflect the switch but, sure enough, it's on the bag's ingredient list. I looked around at some other foods and some use this ingredient and some use no form of it at all. Do the ones that use no form of it have no vitamin k added? Also, do you know if menadione sodium bisulfate is truly safer than the other form? While I was on the phone with the Dr., I mentioned the Nature's Logic. She was intrigued enough by it to go to their website while we were talking. She mentioned that they had tried to go that route in the past but had problems developing the formula so, apparently, the concept of natural vitamin sources has some validity. One thing about the Nature's Logic...the feeding guideline for a 50 pound dog is 2.4 cups daily, which is really low compared to many other brands so it must be a really nutrient dense food. Sorry to bend you ear so much about this, but this brand seems to be one no one has heard of so I'm kind of alone in checking this out. I'm glad you're responding though. You're one of the people here whose opinion I value most on this subject. Jim
