Cats
cream pigment) and only have eumelanin (black, brown, blue etc) present. Perhaps some
other gene causes the eumelanin structure to change so that it is perceived as a golden colour.
Chemical analysis proved that the late colour change Silver Persians did not have
phaeomelanin pigment present.
AMBER-TYPE EFFECT IN MANX
An amber-type effect has also been seen in a Manx cat. Janet McArthur bred a male Manx (a
longy i.e. with tail) that was born an ordinary black/brown mackerel tabby without much
rufousing, as was his sister. In addition, the male had white ticking at the tips of his hair. As
the male grew, his stripes faded out and became spots while the black markings also changed
from black to a burnt red-brown colour and his white ticking became smaller. The change
from stripe to spots was probably an optical effect caused by the change from black to red-
brown. His dorsal line became a burnt golden brown, and the background colour was similar
annaabi.ee 
