Jazzie & Jewel both have cottony coats too. I know it's a NO-NO but...
After shampoo, I use Pantene deep conditioning conditioner (wow! that's a type full!) and when I brush them between baths, I use the Pantene Leave In conditioner. As Adam Sandler said as Billy Madison "It make the hair Shiny & Smooth"!
Because both my girls have long coats, I do occasionally get matts that are just impossible, I snip it off and it doesn't show at all!