When the breed was being developed, larger terriers were used and they have been bred down in size over the years. But those genes still lurk here and there, and if you get the right egg and sperm together, you get a genetic throw-back. I have one that is 15 lbs and another 16 lbs, and they are lean. I call my 16 lb girl "yorkzilla."
__________________ Life is merrier with a Yorkshire Terrier! Jezebel  & Chuy ... RIP: Barkley  Loosie & Sassy  |