Has anyone here been having any problems using Eukanuba large breed puppy food ? My pups have been fed only this food since I took their mother out of the pen with them and they have been having bloody runny stools. The Vetrinarian tested them and didn't find anything in a fecal culture and he thought that they may have a stomach virus and gave them medication. This is my first litter ever and I have lost a couple of puppies and I have another one now that may not make it. They turned seven weeks old on May 24th. I googled Eukanuba puppy food bloody stools and there are a bunch of people that have had problems on a forum that came up in the google listing. If anyone has any ideas it would be greatly appreciated. Thank you very much.