you'll have to frog to get to the mohair parts, at least..
here is a great tip for frogging mohair.
freeze the blanket, and work on it cold
after an hour or so when i warms up, it will be come hard and harder to frog.
freeze it again.
(or bundle up and frogg out doors!)
Mohair is hard to frog at any time, but it is amazingly easier to do when the yarn has been frozen.