I have a 3 yr old English Mastiff that seems to be around 7 yrs old. Recently she went to the vet on Thanksgiving day. I was giving the big dogs a treat of left over pancakes. Shortly after, she would not get up or move. Yipped as if she was in pain. Afraid she aspirated, choking or was getting ill, I called the vet and took her in. The vet took x-rays. Came back and told me that it could of been possible the pancake was blocking and causing pain and pushing on her heart and the 2 spurs that was found on her spine. Apparently my mastiffs spine is building up calcium. She is already having spurs that will cause some discomfort and occasional pain. She is showing signs of arthritis. We have only feed her Taste of the Wild Prairie. Buying 2 - 50 lb bags a month. 4 bags now that we have 2 large dogs. We have had her since she was a 6 month old puppy. She gets fish oil and glucosamine daily, from the day we got her. She is greying day by day. Around the muzzle and eyes. It worries us that she will not be around very long. We love her so much. My 2yr old daughter uses her as a pillow. She is part of the family. I know and have read that larger breeds live to be around 7-9 years. We now have to give her pain medication to help her when she has bad days. Has anyone ever heard of such a thing as larger breeds aging even faster. An even shorter life span? Will we have 5 more years with her???