When my beloved Cocker Spaniel girl got old and infirm, I wanted something to remember her by. She had the type of soft coat that you could simply clip and spin (unlike many Cockers whose coat is too harsh, including my current Cocker). That is what launched this hobby. I have spun pure Cocker (very soft) and Golden Retriever (blended with merino wool). I did a small test of pure Samoyed, which was the best of the lot. I also have a long-haired German Shedder, but her coat, even the down is on the harsh side. I would collect combings and blend with something soft if I wanted to spin her coat. I could see this blended with some nice high-loft colored sheeps wool.
I cannot believe that when I got another dog to replace my old Cocker girl, I got 2 dogs who don't have very good coats for spinning. :( What was I thinking? <grins>