Harley Coated Rats. .
CT Bug
Harley was discovered in 2002 by Old Fellows Rattery. Debbi Needham initially thought the rat she'd found in a pet store was a teddy bear hamster. This rat was named Harley. Rats displaying a harley coat have very long and whispy hair. Since they are lacking an undercoat, their hair will often look thin.
Rex Coated Rats. .
RPR Flash Gordon
In the U.S. we have had Rexes since before 1983. Rex rats have a curl to their whiskers and coat, caused by a lack of guard hairs. Some may have only a slight curve, others may have tight curls.