my 2 Yorkies are very different too! My Charlie is 4.5 pounds at 10 months and soft as satin with a fast growing curly coat.
I was surprised (just like you) when I got my second Yorkie "Belle" ..she is only 6 months but already 7.5 pounds and she is much longer with a narrower snout and coarse hair.
Her coat is slow growing and she has a patch of silver hair on the top of her head.
They seem to look quite different. |