My breeder recommended that I give my puppy 2000mg of vitamin C a day. I thought this was high so I slowly introduced him to it. I noticed that he started having the "runs" about 2-3 times a week. I took him off the vitamin C and his stools returned to normal. I started him up again after a week but once again the "runs" are back. Has anyone else experienced this or heard about vitamin C causing this problem?