Hi Melissa,
Vet Dr. Karen Becker has a video interview with a Newfie breeder who is also a human and pet chiropractor. He has very sound dogs and feeds a HIGH protein raw diet. He had one female Newfie live to age 17. Of course not everyone is in a position to feed raw, especially to a Newf, but wanting to demonstrate that protein isn’t an issue. They have scientific data supporting that conclusion as well.. That same data lists excess calcium and over feeding as problems. It’s in the forum comments HDM mentions.
http://healthypets.mercola.com/sites/healthypets/archive/2011/04/05/how-a-newfoundland-pet-dog-reached-17-years.aspx
