I am so overwhelmed with so many people offering so many good advice, forgot to say that he is not eating commercial dog food. I cook for him, "human food", without all the spices. Now, he is on about only 40% raw, will crank this up. I've never had a dog or a any kind of pet before, reading all info here, wanting to do the right thing, as he is such a good natured rotti. What has stopped me from complete raw food, as I've heard a saying if you feed a dog all raw, they'll turn vicious. I live on 90% raw for year, I am not vicious LOL!! Of course, I realise now, it is non-sense, most likely just a saying.
Thanks again.
Susan