It's been a long time since I've done my research on raw feeding so I'm not sure where I read about using ACV and the benefits. Dogs being fed kibble generally have a more alkaline base in the gut that is one reason when adding raw foods or changing foods some dogs have trouble. Adding ACV just helps in increasing the acid levels. Yes I just pour the ACV over their food, it's usually when I add veggies, yogurt, cottage cheese... it mixes better. When I just feed meat I don't add anything. Some people add it to their water. I don't see any difference in the dogs when I don't add it, but they've been getting it for some time.
Donna

 Quote:

It's been a long time since I've done my research on raw feeding so I'm not sure where I read about using ACV and the benefits.....

I know, I know! (Waves raised hand.)

The NJBoxer site is one of the best (IMO) for every question that can be asked about raw feeding.

On the FAQs page is this explanation of ACV:
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Of the 22 minerals essential for health, apple cider vinegar contains 19 in exactly the right amounts. *Some* of these minerals are potassium, phosphorus, sodium, magnesium, sulphur, iron, copper, silicon and pectin. ACV also contains natural malic and tartaric acids which are important in fighting body toxins and inhibiting unfriendly bacteria.  There are claims that the additional acidity of ACV helps the digestion process.  Many dogs like the taste of it, and it even makes the RMBs smell less raw meaty-like.  Many people soak the RMBs in ACV prior to feeding, to aide with the digestion of bones.   Remember in chemistry class, soaking a raw bone in vinegar?  It turned rubbery!  hummmm..some food for thought for those of you afraid of splintering bones.   Again, the option to use ACV is purely another personal choice...some do and some don't.....
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http://www.njboxers.com/faqs.htm