Other recent felting included some further exploration of the possibilities of polka dots.
Solid blue-green is Lincraft Cosy Wool, and the self-striping is Sean Sheep Rockbank.
These dots are still embroidered on after knitting. I haven't yet figured out the two-layered structure I pondered before. Alwen might be onto something with the double-knitting idea, but I don't know if I'm ready for that.
Twilley's Freedom Wool plus yellow spots in some miscellaneous 8ply.
And as for these fuzzy hairy bastards, too much acrylic content I think. I finally tried out the 'new' (several years ago) Lincraft Big Wool (50% acrylic, 50% wool). The old 100% wool version was a wonderful felter. This one I won't bother with again.
Edited to add: Forgot to mention the Big Wool is combined with a strand of feltable 8ply - without that the results would be even less like felt.