Hi there,
It should be okay, I think - the added Ginseng.
I'm wondering as much about the Dan Shen. Your clients formula is designed to increase blood flow to the heart, whereas the CHJLGMLT is designed to reduce pre-and afterload by dispersing blood from the chest. So there may be some cross purposes between the two formulas. Your client's formula is designed to deal with angina and infarcts. Yours is designed to deal with CHF. So as always, start with a low dose and work your way up to ensure you don't destabilize the dog.
Continued good luck!
Steve