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Originally Posted by YorkieRose  I am sick to death of hearing a breed potential has been tested and found clear of everything. There are so many problems that crop up in genetics and there is NO tests available for it...sure a Yorkie can have a perfectly healthy liver, no signs of a shunt..but that does not mean 100% he will never sire a liver shunt puppy..there is no genetic test for LS easily available to the breeder...you take your chances.
He can have perfect knees, but he can sire luxating patellas, Legg Calve Perthes, PRA, the list is endless.
How about a bad bite..both parents can have perfect bites and produce a pup or pups with under or over bites..it is a recessive gene.
When you select an inbred stud for your breeding program, you are NOT "trying" one breeding...a stud can sire dozens of puppies, a one time breeding may produce 3 or 4 pups...I would avoid an inbred stud or bitch at any cost...
So, in order to keep the line strong and not tempting Mother Nature..and that woman is a bitch!! we avoid inbreeding..or the wise breeder does...it will catch up to you at some point, always does...How do you think the Liver shunt problem spread in the first place..INBREEDING!!! Yeah, I'm screaming..sorry. |
I'm in complete agreement with you on this one. I'm no expert, but I do think I have a good understanding of genetics. If any diseases are predisposed genetically on recessive genes, it is possible to inherit those kinds of diseases to their offspring. Tests would not show come back positive for diseases like these. But if both a mother and son are carriers of the bad gene, and they are bred together, the chances that a new litter of puppies is actually affected by the disease increases dramatically!!! Inbreeding could be a real problem.