Genetics is VERY complicated and requires lengthy, in depth study in order to understand what genetic color "codes" are actually "tied" to health concerns and which ones are nothing more sinister than pattern distinctions. Parti Yorkies are a pattern issue with the breed standard, NOT a health issue, UNLIKE the recessive "dd" gene attributed to blue born pups. We do not ever want to intentionally breed to get blue born pups, nor do we deliberately try to get Albino pups. These are health issues tied directly to gene combinations. There is a major difference in color issues that are just "not acceptable" to a breed standard versus gene color issues that predicate genetic health defects. |