We recently went to the dog pound and found a beautiful mix little dog ( about 2 yrs old) . We were told that this poor guy was kept in the basement at all times. Here's the problem he wont poop out side ...we have had many dogs over the years so we sorta know how to train etc ... but this little guy is something special. I don't want to rub his nose in it and all that so please don't suggest this. any thoughts here as to how we can convince him to go outside ??? Thanks.