You might want to look at chiropractic or acupuncture for this dog as well. They can help manage incontinence.
Other formulas we can use at the same time include on called Bu Zhong Yi Qi Tang.
We can also try adding some different herbs to the You Gui Wan as a further option.
Probably the Bu ZhongYi Qi Tang or a consult with an acupuncturist or chiropractor are the two easiest things to try.
Cheers!