absolutely adorable Dasher! a hint...
It is best to not clean with any product that is ammonia based. If you get K.O.E. (Kennel Odor Eater) or some such product from the vet office, you will find that he cannot pick up his scent and will not be encouraged to pee where it smells like him or similar to him. Believe me, after 18 puppies together, I found this works wonders.
"For every animal that dies in a shelter, there is someone somewhere responsible for its death".