Hi! I am new to the site. My very first post! I have been trying to find out what would be the best foods for an English Mastiff that is no longer a puppy. He is not even two yet but I don't believe he is even close to being full grown. Anyway, right now he is eating Precise Holistic for large breeds. I have used other Precise food too just because when I go to buy the food they don't always have the kind for large breeds. I also have a Leonberger so they share the food and I would like to keep them eating the same. The only problem is that Hooch constantly has runny poop!!! I have tried pumpkin. I am going to fast him today if he makes it through the day. He LOVES his food and if he doesn't get food and water when he wants it he starts flinging his bowl around or knocking things down in our pantry, lol. He will also whine. I have never had a dog quite like him before, hahahaha. But so far so good this morning. He hasn't bugged me for food yet. I am wondering if the food just isn't a good match for him if he has the runs and my Leonberger doesn't. Any suggestions on what might help him? I feel so bad for him. The other night he wanted out three times!!! Other than that he doesn't seem sick at all. Loves to eat and play still. He has an awesome coat and he doesn't scratch. Thank you!!!!!