Hello We have a DDB 13 week old puppy. This is not our first giant breed although I feel that perhaps we were not quite as knowledgeable about the requirements/growth of a giant breed as we are now. She wasn't doing well on the chicken based food as her stools were soft and sometimes runny so knowing that mastiffs are quite often allergic to chicken in kibble, I transitioned her onto another protein. I researched calcium levels and read forum posts etc so decided to put her on Markus Muehle Black Angus Adult. The calcium % is 1.3, phosphorus 1.1 and fat 10.1 I felt this was right based on what I'd read and I like cold pressed foods having used them before. However, I continued to research having started her on the new food as I then wasn't sure how much she should be eating as she is a pup and the feeding recommendation on packet is obviously based on an adult. My head is now spinning as I've read conflicting advice that calcium should be 1%, and that fat content should be higher than the above percentage. I am now in a right pickle! I will say that her stools are now much more pleasant and her gas has diminished! So... I am seeking advice from those who have been on this journey before and have an insight about required nutrition. Thank you in advance!