Please all you guys ..........any TM in west is not pure. well may be not but most of the lines that are in west were the dogs imported from China (tibet) Nepal and India. I come form india and have seen many TM there. We have lot of sub types found in foothills of himalaya . In theory as the altitude in mountains increases more pure blood TM are found in the region for generations people bred pure TM with local shepherd dogs and mind you some these cross bred are as tall as 31 and have quit heavy wrinkles . Please note that wild TM are still found on higher altitudes in himalayas and they some time breed with local bitches . If still in doubt please visit http://www.tsangkhyitm.com/en/who_are.htm. Thanks