Cross Breeds - Breeding Brother and Sister Dogs?

Breeding Brother and Sister Dogs?

OK well.........my cousins and her friend bought 2 chihuahua puppies from a litter and one got a girl and one got a boy so i went over to there house to help them out (they don't know a thing about dogs!) so i offered to help,so anyway while we were playing with the pups i said "how cool you guys have a set a little girl and a little boy there so cute together they will grow up together like children" and my cousin starts laughing and says "like children! more like lovers! I'm going to breed them!" so i told her "what i donut think the baby's will turn out right!" so then i told her not to and they should be fixed she said "the only way i wont breed them is if i have proof!"so i want to know if i am right? and it is bad to breed siblings? and what will happen if you breed siblings? and what affect will the baby have? ect.ect. and also if you have a link i can read and print out for my cuz, would be great! Thank You So much!

Public Comments

It's potentially a big problem to do that! http://www.dogbreedinfo.com/inbreeding.htm
My friend had brother and sister labs and just didn't even think they would mate; but unfortunately they did and the babies had all kinds of health problems some died at birth. They were not as smart as other dogs and they constantly had health problems. Her vet bills were crazy. Don't let them breed.
DONT DO IT! the puppies will have SERIOUS health problems!
They will have a much higher incidence of genetic defects. The reason being, they share the same, narrow gene pool, so recessive genetic disorders that one carries, the other likely carries as well, making it much more likely the puppies will actually have a disorder or malformation. It's just a bad idea all around.
Hi I'll try to make this simple. Breeding siblings will generally bring out the best genetic traits, and the worst genetic traits in the offspring. This type of breeding should only be attempted by experienced breeders who have done much research, and all available testing, to ensure the best outcome. These breeders are very selective in their lines, and only do this to better the breed. For those attempting this because they simply have a male & female dog, the results can be disastrous. This is particularily true for brother & sister, since the genes are so closely matched. It is almost without exception that any responsible breeder would use brother & sister, unless trying to save a species that is almost extinct.
If your friend breeds siblings she will be at the level of the lowest puppy mills. The dogs will not be healthy because they will double any questionable qualities i.e. bad hips, eye problems and birth defects. The DNA is the same with each dog. Breeding is not a way to make easy money. Care for the female is time consuming and expensive. The litter is time consuming and expensive. Puppies need to be with the mother for eight weeks. The female must eat premium dog food several times a day. The diet of the female has direct bearing on the health of the puppies. If she hasn't researched breeding and read books on whelping she is a fool. Take her to the shelter and ask her if she wants to contribute to that. If her litter is five dogs those five dogs have the potential to breed five litters of five which is 125 dogs that goes on for generations. Can she assure good loving homes for the life of these animals? Spay and neuter is the only answer. (scgrrescue.org)
yes, its just like people.. brother and sister breedings only result in genetic problems.
No, breeding siblings are OK. No problem as long as they do not have a bloodline disease. Anyway, she should not breed unless she has enough experience and knows who wants to have chihuahuas. After all; breeding takes patience, time and money.
This question just proves that there are so many ignorant people out there willing to breed and sell pups on the net for extraordinary amounts of money, without reg'd papers, vet input and proper testing done. This is also why in rescue when we get dogs we fix them, so that these mistakes don't happen again. I don't breed my 2 JRTs, unless they are fully up to date on deworming, prevention parasite medicine, vaccinations, CERF, BEAR testing, testing patellas, DNA for records keeping. In this day and age with technology and availablty of technology there is no reason to breed brother and sister dogs. One day we may stop breeding and just clone all the good dogs, like they did in Korea for their canine unit.
You're absolutely right. Inbreeding is a risky task, the puppies could have mental and *sometimes* physical defects. Only very experienced and knowledgeable breeders should attempt to do this, as there are some good sides to it. It's a useful way of fixing traits in the breed, but despite this, some experienced breeders still (Wisely) choose not to inbreed their dogs. Technically. It's not bad. But it's not good either. There are pro's and con's to inbreeding dogs, but the pro's outweigh the cons greatly. I've heard that it is natural in the wild. As the Alpha of a Wolf pack would mate with his daughters and grandaughters. Tell your cousin not to breed these dogs. Also, please tell him that there is a lot more to breeding than owning a male and female dog. They need to be health checked, OFA certified, have their champion title, have excellent temperaments etc. etc. http://www.dogbreedinfo.com/inbreeding.htm http://www.geocities.com/farmcollie1/inbreeding.html http://www.messybeast.com/inbreed.htm
In-Breeding and other Breeding Methods One of the most hotly talked about topics with regard to pure-bred dogs is the use of in-breeding. This is a term that is often misused and is extremely misunderstood. Part of the misunderstandings come from differences in the way the terms are used within the scientific/medical field, and how it is commonly used by breeders. These are the most commonly accepted definitions used by serious dog breeders and will be the definitions used within this article. In-breeding - This is the breeding of closely related animals. Brother-Sister, Parent-Offspring, ½ brother - ½ Sister. Line-breeding - This is the breeding of animals that share common ancestors but are not closely related. For example the dogs may share a common great-grandparent. Out-cross - This is generally considered the breeding of animals with no common ancestors within the first 4 or 5 generations. Common Misconceptions In-breeding causes genetic diseases - Breeding closely related animals increases the possibility that any bad genes in a line will show up. It does not 'cause' genetic disease. Out-crossed dogs are healthier - This is only partly true. There is a known phenomenon called Hybrid Vigor. Two animals of unrelated strains breed and the offspring is often bigger and grows faster than it's purebred cousins. This method is often used by farmers in order to get their animals to market sooner. But one of the biggest misconceptions of hybrid vigor is that it applies to all animals of mixed heritage. Hybrid Vigor only applies to the animals that are the direct offspring of the crossing of the unrelated strains. In other words if you continue to breed animals of different strains there generally will not be any additional increase in hybrid vigor. If the unrelated strains share common genes for genetic disorders, hybrid vigor will not over ride the risk of the disorder showing up. Out-crossing can also cause problems if widely divergent physical types are mixed due to differences in growth rates and bone and muscle sizes. Benefits Of Each Type Of Breeding By definition, purebred dogs have a smaller gene pool to draw on than mixed breed dogs. That smaller gene pool gives the breed its individual characteristics, such as physical appearance and temperament. It is what makes a poodle a Poodle and a Golden Retriever a Golden Retriever. But there is considerable controversy with regard to whether the gene pools of the modern pure-bred have become too small. Inbreeding - In-breeding is more likely to help "set" or "fix" a particular trait within a breed or a line by narrowing the gene pool to favor those traits. So if a breeder is looking to set a particular desirable feature of their line then in-breeding and choosing the offspring most strongly possessing that trait can be beneficial. In-breeding can also help identify those bad genes that exist within a line. Dogs possessing the bad genes can be eliminated from a breeding program and carriers also identified. Intermittent in-breeding within a line or breed is not damaging to the long term health of the animals. However, in-breeding over successive generations can lead to reduced fitness and fertility problems among the offspring, resulting in a phenomena known as In-breeding Depression. It can take many generations to show up depending on the traits involved. To use this method responsibly a breeder would not want to in-breed on animals with known genetic disorders, temperaments not in keeping with it's given breed, or known serious structural faults, or to in-breed frequently even on healthy-superior specimens Line-Breeding - Line-breeding is another way to help "set" or "fix" desirable traits. With line-breeding you breed animals that are related, but you are also routinely introducing genes from other lines into the genetic mix. It takes longer to fix the desirable traits this way, but doing so lowers the risk of those problems associated with repeated in-breeding. With a tight line-breeding you might find the same 3, 4 or more dogs showing up numerous times in a 5 generation pedigree. Loose line-breeding over successive generations will result in more variations of physical appearance than would in-breeding or tight line-breeding, but will keep the physical look and structure within the same general size and shape, it also carries fewer long term risks According to geneticists. Line-breeding can be carried on for many many generations without deleterious effects on the line or breed as long as the individuals involved have few hidden genetic disorders. Out-Crossing - Out-crossing in terms of pure-bred dogs is the breeding of unrelated dogs. On a pedigree no names will be repeated within the first 5 generations. This type of breeding has both advantages and disadvantages. Which as it turns out are flip sides of the same argument. With out-crossing you are maintaining the greatest genetic diversity, but this also leads to the least consistency in terms of physical appearance and other traits. Out-crossing does not guarantee that the animals won't develop genetic disorders, but it does tend to reduce the numbers of affected offspring. Your best chance of getting an animal that is less prone to developing a genetic disorder comes more from finding a conscientious breeder that screens their animals for hereditary disorders and breeds for the betterment of the breed. http://www.bulldoginformation.com/breeding-types.html
yes that causes alot of problems! eg. a friend of a friend bred two german shepards brother and sister and as they got older their ears didnt stand up! and they were very weak... dont do it its cruel and the same as if you had a baby with your sibiling.. the child would have ALOT of problems...
you were right they probably wont turn out healthy, its kinda like the same with human.
I sure wouldn't do it. I think any breedings like that need to be left to those that know for sure what they are doing if at all.