Debbie, This is wonderful news!!! My first thought was also that he was getting more excercise do to his younger siblings. I know that Storm's in much better shape due to his younger brothers and sister.

Will Eliot use the litter box if there isn't anything in it? If so then this would be the way to go. At my vets they put a needle in my cats bladder to extract the urine. This way I don't have to get a sample from home and it's also much fresher and more sanitary. Good luck.