I love my dog, but...

have other causes been ruled out?
I can attest to dealing with a leaking dog can be a hassle and I did it for YEARS with my previous dog. I got her bitch britches and bought cheap pullups for inside the diaper.
Her leakage was mainly due to her liver disease. Can't recall how that all worked but she did have bouts of UTIs at one time having emergency surgery to have stones removed from her uretha and bladder, and she tended to have spay incontience.
Yes it was a PITA - BUT I dealt with it. One summer, really hot humid week, she was on a diuretic and pred to help get rid of some of the excess fluids build up from her liver disease. I took the week off from work and stay attached to my mop cleaning up after her.
I loved but dog....and if my sons had had a leaking problem I would have done as much for them as I did for her.
I simply did it....when she died and I didn't have to deal with it anymore it was a relief - yup a relief. I knew she wasn't going to live forever, the cleanup was temporary although it went on for the final 3 years of her life. I simply wanted her to be with me more than I worried about the hassle of mopping up after her.

Thanks for all the help.  I'm gonna try the cranberry pills and talk to the VET about DES.  In reading some of the post, it kind of sounded as some of you thought I may get rid of her or something.  Rest assured that is farthest from the truth.  My dogs are my girls and are spoiled rotten.  I would never get rid of either of them for any reason.  Also, someone mentioned leaking more at night while sleeping.  Nikita doesn't do this.  I'm not sure why but I would certainly know since they both sleep in my bed.  I just need to get this solved soon.  It's hard to look into those sad lil eyes when she has an infection.  I'm sure it's hurting her like hell.  Thanks agian for all the help. 

Catching this late, but our beloved lab mix, Jesse, developed some incontinence issues, albeit later in her life.  DES also worked beautifully for her and us for many years - she was about 16 when spleen tumors were detected and we stopped DES -it had started to be less effective anyway.  We invested in some furniture protecting pads that could be washed frequently and dealt with it for the next 2.5 years.