I would suggest you post in the breeders section about what to be feeding this pup - bc he is SO young. Red, irritated anal glands is not normal at all - nor is repeated butt dragging; so, something is irritating his system. Perhaps his system isn't getting the right food yet? I really don't have the right advice for a 7-week old pup - but the breeders on YT do - so please reach out to them, they are wonderfully supportive.