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| | #61 | |
| Mardelin Yorkshire Terriers Donating Member Join Date: Aug 2006 Location: California
Posts: 14,776
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__________________ Mardelin Yorkshire Terriers | |
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| | #62 | |
| Donating YT 10K Club Member Join Date: Oct 2005 Location: Alabama
Posts: 11,432
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Not at all the case with what is being discussed here. While that may be how the YT originated, the two situations are not comparable at all. Last edited by BamaFan121s; 04-15-2010 at 06:48 AM. | |
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| | #63 | |
| BANNED! Join Date: May 2008 Location: USA
Posts: 1,218
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| | #64 | |
| Donating YT 1000 Club Member Join Date: Aug 2009 Location: Austin, TX
Posts: 1,601
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You are so right because my head hurts reading about breed mixing
__________________ life with my Cerise | |
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| | #65 | |
| Donating YT 1000 Club Member Join Date: Oct 2006 Location: Texas
Posts: 4,280
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I mean I clean my house, work a full time job, care for dogs and on occassion keep my grandkids, travel ect, so I'm not a lazy person in that aspect but I would be lazy if I didn't take the time to breed correctly that goes hand in hand and yes it's LAZY! Donna | |
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| | #66 | |
| Mardelin Yorkshire Terriers Donating Member Join Date: Aug 2006 Location: California
Posts: 14,776
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Genetics If a purebred dog of breed X mated with a purebred dog of breed Y, both meeting health standards for their breed, is there a better chance the offspring would be healthier than a same breed mating because the gene pool is larger? In terms of health alone the first answer would be that in breeding two healthy dogs it shouldn't matter if they're the same of different breeds, you're apt to get healthy pups. But this doesn't take into account the question of recessives. Suppose you breed two dogs of different breeds that both have the same incidence of a recessive health problem. The pups would have the same odds of having that health problem as purebred pups of either breed. On the other hand, suppose the two dogs were of breeds that have no recessive health problems in common. This would reduce or eliminate the odds of the puppies of having the health problems of either breed. This is the classic explanation for the theory of first generation hybrid vigor. The resulting pups should not be bred though, since they'd have a good chance of having the recessives from BOTH breeds, so the grandpups would be inclined to be worse off than the purebred offspring of their grandparents. An excellent set of articles dealing with "hybrid vigor" can be found in DogWorld, Jan 1997 by George Padgett DVM. Another very important point to keep in mind is that when a purebred carrying a genetic defect is crossed with another breed or mixed breed, the "bad" genes do NOT "go away" even though they may not be expressed in the offspring. If crossed with another dog carrying the same defect, the offspring of that breeding will demonstrate the defect. When you breed two different breeds together, what kind of variation can you expect? Pfaffenberger's book has some interesting data on this. He did some experiments with four different breeds. They were dogs of approximately the same size, but very different physical appearance AND behavior. The results he saw in the first and in subsequent mixed generations are pretty interesting. Let's look at a common crossbreeding: "cockapoos" (which are not purebred dogs, nor registered with any registry). These are crosses between Cocker Spaniels and Minature or Toy Poodles. The dogs actually vary quite a bit, some being more poodle like than others, and some being more cocker like than others. However, they are generally all a small sized, buff colored shaggy dog. If you breed two cockapoos together (not generally done), you get an even wider variation of dogs -- some look like Minature Poodles, others like Cocker Spaniels. The reason for this is the recessive genes hidden in the first cross that came out in the second generation. This is actually a visual example of why "hybrid vigor" doesn't hold.
__________________ Mardelin Yorkshire Terriers | |
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| | #67 | ||
| Donating Member Join Date: Feb 2008 Location: Mississippi
Posts: 2,564
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Not saying any of this in defense of mixing breeds....just feeling a little anal this morning. | ||
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| | #68 |
| Mardelin Yorkshire Terriers Donating Member Join Date: Aug 2006 Location: California
Posts: 14,776
| [QUOTE=Woogie Man;3085948]One anomaly that sticks out to me is the Silky Terrier. It is essentially a 'designer breed' that has been recognized by AKC. That will never again happen as the rules for recognition now preclude mixing of any 2 recognized breeds. There must have been some howling at the time as it only took the AKC one year after admitting the Silky to change the rules. However, AKC will accept the mixing of two breeds if it is being bred for a purpose: Case in point the Laberdoodle is being seriously being looked at for acceptance. There are those that are breeding, with the correct documentation and purpose. I'm not sure the Yorkie is better suited as a ratter than other terriers. In fairness, there was some vanity in the creation of the Yorkie as it was developed for a 'look' and other similar breeds disappeared due to the Yorkie's winning in the ring. The Yorkie is soon to be joining the Earth Dog arena So, it will be going back to it's original breeding purpose. QUOTE]
__________________ Mardelin Yorkshire Terriers |
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| | #69 |
| Donating Member Join Date: Feb 2008 Location: Mississippi
Posts: 2,564
| Could you clarify? I'm basing my earlier post on this, taken from the AKC site, plus other things I've read on the Silky. "The FSSŪ is not open to "rare" breeds that are a variation of an AKC-registrable breed or the result of a combination of two AKC-recognized breeds. This includes and is not limited to differences such as size (over and under), coat type, coat colors, and coat colors and/or types that are disqualifications from Conformation Events by AKC breed standards" |
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| | #70 |
| No Longer a Member Join Date: Feb 2007 Location: New York
Posts: 761
| How come all these threads are started and the original OP only posted once in it Unreal. |
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| | #71 | |
| Mardelin Yorkshire Terriers Donating Member Join Date: Aug 2006 Location: California
Posts: 14,776
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__________________ Mardelin Yorkshire Terriers | |
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| | #72 | |
| Donating YT 1000 Club Member Join Date: Oct 2006 Location: Texas
Posts: 4,280
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| | #73 | |
| Mardelin Yorkshire Terriers Donating Member Join Date: Aug 2006 Location: California
Posts: 14,776
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__________________ Mardelin Yorkshire Terriers Last edited by Mardelin; 04-15-2010 at 07:23 AM. | |
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| | #74 |
| No Longer a Member Join Date: Feb 2007 Location: New York
Posts: 761
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| | #75 | |
| Donating YT 10K Club Member Join Date: Aug 2007 Location: S. W. Suburbs of Chicago, IL
Posts: 12,235
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__________________ Never argue with a fool, onlookers may not be able to tell the difference. Mark Twain | |
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