Hi and welcome to YT! Thank you for the compliment on my Golden girl Mercedes
. The Yorkie you posted a picture of was not born with a color anomaly....the standards change color for quite some time as has been mentioned. The Dandi Dinmont Terrier is believed to be part of the Yorkie "ingredients". I will attach a picture of a mustard colored Dandi. Until goldens popped up in a litter of mine, I knew very little about color anomalys which are due to recessive genes. Yorkies come in "standard" colored, "Golden", "Chocolate", and "Parti". They can all be found here on YT
. The color of the Yorkie you showed wouldn't be my top concern, it would be the disposition and health. If it is aggressive as you said, a person could run into many problems. Oh, I think I'm rambling too much....if only I could say it was my first time
. You can check out my Yorkie gang on my website (a very simple type, but I am working on a new one). I have 2 standards, a golden and a chocolate....I love 'em all!!!
I hope this helped, even if only a little....