LOL Patti !!! I wish I knew how to explain it - but after Chanel ran around bare assed for about 2 months I LEARNED to not shave too much -

It really was funny looking - everytime I watched her from behind all I could think about was National Geographic and Monkeys lol
What I do it take tiny little strokes - and stand back to check how it looks - and do a few more little 'strokes' She's very good about it - stands there with her legs a mile apart ...the trick is to trim up and down - not across.
and a little trimming on the INSIDE of the legs will help too. No one can see that and it really helps with the pee. It must work cause I can kiss tummies anytime and my girls never have that pee smell - unless ....they need a trim