Spencer/Chuck,
Since Spencer is half Manx, does he have the double coat or undercoat? Could that contribute to the matting? Just read in Cat Fancy magazine's article on the Manx (thanks for posting the tip on that article, by the way) that the Manx double coat calls for regular brushing, so I'm trying to remember to keep Stump (shorthaired Manx) brushed. Fortunately he likes it. Anyway, just a thought.