I like Pat am not concerned by the studs size unless oversized......
Each girl and male is different. So, many things come into play when breeding a yorkie. Lines (line breeding), free whelpers, etc. In addition, the female controls the size of the pups while in utero, so producing a pup at whelp that is 5 or 6 oz or 3 or 4 oz.....doesn't really tell you what the pup will be at adult hood.
__________________ Mardelin Yorkshire Terriers |