Atticus barked at you? Wow, that makes you one of like three people he's ever met. Consider it a mark of distinction, Wardsgirl...although I should point out that one of the only other people he has ever barked at was one of Whitey Bulger's hit men. (Seriously.) Allow me to apologize for his barking now as it is rare.
As for his clothing, you are correct: he is mostly a nudist by nature, foregoing even a collar, but on cold, cold days in the mountains he's donned a body suit that makes him look a bit like Aqua Man. It's made by K9 Topcoat and has worked well for us. However, he's gained a bit of weight and it does not fit him perfectly any more, but I we have someone to do a new fitting for him.
Nevertheless, thank you again for your good offer.
On another note, a beautiful avatar you've got there, but I laughed at the previous one and would like to give a medal to the person who came up with those stickers. I saw them often in and around the Sandwich Range last winter.