We just recently went on vacation for a week and left the nub butt with the sister-in-law (and her *insert-word-here* boyfriend). As soon as we get him back, he's scared of everything -- again -- and we're not told anything is up. He even up and pees on the bed even though I attempted to take him out earlier, with no sign of wanting to go to the bathroom.    He's just having some really off behav…