Purrley,
I didn't realize Tess was so young. I wouldn't use a shock collar at that age either. I took 5 obedience classes with my dog when she was younger, and used the shock collar as a last resort for times when she would just not listen. Harley was about 10 months before I got the shock collar.

Dixyland's idea is great. However if your dog is like mine was its not only when the poop is fresh. You may have to coat every thing in the litter box.