Most breeders of purebreds used eugenics in their standard, as set by The Kennel Club. Before their were breed standards to follow, breeders were free to create their own lines freely, with a outcrossing or two to sure up their lines. This also created a more vigorous and healthy dog. To understand this you must understand dog breeding. A good book to read that all breeders should read is Breeding Better Dogs by Carmelo L. Battaglia. Health issues often seen in the Yorkshire Terrier such as bronchitis, lymphangiectasia, portosystemic shunt, cataracts, and keratitis sicca, Luxating patellas, distichiasis, hypoplasia of dens, Legg–Calvé–Perthes syndrome, hydrocephalus, retinal dysplasia, tracheal collapse, and bladder stones can be bred out if breeders come together for the health betterment of the breed. When it comes to breeding better dogs test can tell us a lot, along with time and a well trained eye on your side is the road to success.

Breaking the Mold: The Eugenics of Dog Breeding

Breaking the Mold: The Eugenics of Dog Breeding | On Bipeds & Brutes

Marlene your breeding program will never ever ever ever be anything but a byb/greeder program until you decide to do what is best,,,,while I enjoy your enthusiasm in trying to be first to the finish line with some new creation of DOG....its already been done, its failed miserably....because of you and people like you millions of dogs die everyday.....great job, you should be proud....

Poo-dogs & Designer Mutts


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I have to say after reading some of your threads I am really confused about why you would come to a yorkie forum and try to change the minds of all of us who love this breed. If we want a dog that looks like a poodle, pom, chi, etc that is what we would buy. We love the looks, tempermant, loyalty, and personality all rolled up into these beautiful little yorkies. That is why we purchase them. I am so happy we have good breeders still who strive to keep them not only looking like yorkies but healthy.

what I don't understand... is how is mixing breeds, designing a new breed etc going to solve the problem of illness in dogs?

I was heart broken about the pain some of the pups were going through in the documentary. In my humble opinion we need better testing and research in prevention of said defects....I just don't get how unethical breeding will lead to that???? How is "creating" a new breed or breeding a new color prevent defects???

Her initial reason was to drum up business...you know hybrid dogs, swampland in florida etc....

Absolutely false. You don't breed out things like LP, liver shunt etc by mixing breeds. They are bred out by careful tracking of lineage to determine what genes they are associated with. NOT by random breeding of mutts.

First you must understand what outcrossing means.

Outcrossing

From Wikipedia, the free encyclopedia

Outcrossing is the practice of introducing unrelated genetic material into a breeding line. It increases genetic diversity, thus reducing the probability of all individuals being subject to disease or reducing genetic abnormalities.
It is used in line-breeding to restore vigor or size and fertility to a breeding line. "Linebreeding", is where animals carry a common ancestor in their pedigrees and are bred together, should be considered distinct from the term "in-breeding" which is the production of offspring by parents more closely related than the average.[1]
Outcrossing is now the norm of most purposeful breeding, contrary to what is commonly believed.[2][3][4][5] The outcrossing breeder intends to remove the traits by using "new blood". With dominant traits, one can still see the expression of the traits and can remove those traits whether one outcrosses, line breeds or inbreds. With recessives, outcrossing allows for the recessive traits to migrate across a population. The outcrossing breeder then may have individuals that have many deleterious genes that are expressed by placing their animals against a similarly outcrossed individual. There is now a gamut of deleterious genes within each individual in many breeds.[6] However one may increase the variance of genes within the gene pool by outcrossing, protecting against extinction by a single stressor from the environment. In cats, there is currently a study running to determine the genetic diversity within the cat breeds.[7]
Outcrossing is believed to be the "norm" in the wild.[6] However, it is not logical as migration occurs by necessity. Feral cats, for example are one of the most inbred as individuals remain nearby their original homes, unless environmental stresses drive them to migration.[citation needed]
Breeders inbreed within their genetic pool, attempting to maintain desirable traits and to cull those traits that are undesirable. When undesirable traits begin to appear, mates are selected to determine if a trait is recessive or dominant. Removal is accomplished by breeding two individuals of known genetic status, usually they are related.[

Wikipedia?
Heck, they let anybody write articles.

Joyziegirl-I guarantee you that I have done quite a bit of studying genetics. And not from Wikipedia.

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When they are able to actually tag the specific DNA and chromosomes that are responsible for these diseases, and they are ever soooo close to doing this successfully, these diseases will be so much easier for those that study pedigrees and lineage, to avoid breeding/combining pairs that will produce these diseases, and we can completely irradicate them. And just FYI: It is devoted, dedicated breeders/show breeders that are contributing names and DNA and blood to research, so that genotyping and IDing the suspect chromosomes/DNA that is getting us closer to the answers we are desperately looking to find......it is NOT the people that are breeding mutts that are devoted to irradicating diseases from the purebred breeds. They have their OWN agendas. As for outcrossing...you outcross to different blood within the breed, from a different line, NOT by mixing a different breed into the mix!

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I'm happy for ya. I just thought it best to explain outcrossing in it most simplest form so you could better understand it. Glad to know you are highly educated on the subject. Cute Morkie you got there.

I was just going to ask if this wasn't the case. Thank you for clarifying it.