Sorry I can't type in Vietnamese. Without Vietkey, MOD will del my answer right the time
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Thanks NKA for your help.
This color is very popular in the U.S., but it's not acepted by England and Spanish, where the dog came from. They only accept black, buff, tri-color so the dog with chocolate color never comes to dog show. I have the registration and certificate of full blood, but that's it...Especially my dog has some white under his chest, he definitely can't go to the dog show because they consider his color is wrong. When he grows up, the color will be lighter, it comes to the light brown, almost dark red. The most expensive color in here is buff color (kind of dark red, nearly like the cow's color), which is very popular in Vietnam. It's hard to find that color in here. I will type my answer again when I come back to my laptop with Vietkey. Thank you all.