Why is Scrapie called such?
Scrapie
derived from one of the clinical signs of the condition, wherein affected animals will compulsively scrape off their fleeces
The name scrapie is derived from one of the clinical signs of the condition, wherein affected animals will compulsively scrape off their fleeces against rocks, trees, or fences.  The disease apparently causes an itching sensation in the animals.  Other clinical signs include excessive lip smacking, altered gaits, and convulsive collapse.[6]