Rubbing their nose in the mess is really very uncalled for! Maybe the husband needs to read a few modern puppy training books! Dinosaur!
Would you rub shit on a childs nose for messing it's nappy??? I doubt it, you teach the child about using the toilet...same for dogs, repitition is the key watch the pup and once it starts running round with it's nose down looking to go you gotta get it outside and use the same word each time it goes outside(toilet, go pee, go poo or whatever you want). Punishment will NOT work only stress it more