U Ask: Brown, Black Spots in Papillons + Phalenes.
All dogs have about 10 genes which affect its color. Each gene is in a different chromosome, and therefor are independent from each other.
The T Locus is responsible for those brown, black spots. It calls ticking, or freckling.
The amount of ticking varies from none to all over the body. In Papillons, Phalenes it usually occurs on their legs and muzzle.
Ticking is not seen at birth, but can be seen as early as a few weeks of age or later at one-two years of age.