It ,might just be the case that one of yer mates put him round to the door but keep yer gaurd up mate you never know
i have had the same thing happen to me and it was two weeks after when i seen one of my freinds and the first thing he said to me was DID THAT GUY COME ROUND ABOUT THE DOG , it wasnt until then that it all fell into place , i did give him a telling off for not informing me first but you know how it is some folk just dont think .