I've heard that the Quic shampoos don't do a good job of cleaning. That's why I wanted to use the Eqyss shampoo first.
I use QuicSilver all the time on a paint horse I ride. I agree, I don't think it cleans the best, but it really whitens what's already been cleaned! Believe it or not... but my shampoo of choice is SUAVE! It cleans just as well (if not better) then all of the expensive horse shampoos out there, doesn't dry out their skin, and leaves them smelling nice. Then I got back with the QuicSilver and leave it on for 5 min for a glowing white shine!