I just wanted to share this because it kept getting mentioned that Particolor was random spotting, and that there was no other definition for the term particolor.
Main Entry: par·ti–col·or
Pronunciation: \ˈpär-tē-ˌkə-lər\
Variant(s): or par·ti–col·ored \-lərd\
Function: adjective
Etymology: obsolete English party parti-color, from Middle English parti, from Anglo-French, of two colors, from past participle of partir to divide
Date: 1530
: showing different colors or tints; especially : having a predominant color broken by patches of one or more other colors <a parti–color cocker spaniel>