I'm not sure about the dry nose thing.. Is it cold? If the nose is cold, then it's fine (or so I was told by the trainer).. sometimes it gets dry.. maybe it was just a one-off thing.. check when you reach home again.. when was his last deworming? maybe because of that?
2nd question - hahahah.. yeah there have been a few concerns regarding that & all I could make out was that is normal.. I'm no expert but of what I've read is that they raise their leg to mark