Why is inbreeding soo bad?

Question

i have two dogs (boy and girl) and they are brother an sister, but they are mating with eachother...is it really that bad if she becomes pregnant?

But i believe they have different dads also

I have family and friends that will love to take the puppies, so having people for them is not a problem

Answer 1

Even if they have a different sire they have the same dam so the same dna from her side. Inbreeding reduces the gene pool, if there are genes that the dogs carry one copy of they may not be affected by the disease but breeding carrier to carrier will produce pups with a copy from both parents and are affected.

Reducing the gene pool 'sets' characteristics whether they are good or bad. On the good side it can be used to produce almost carbon copies of the parents when the parents have no hidden defects. On the bad side it can bring to surface defects that are carried but not visible in the parents. Once the gene pool is reduced for the good or bad it is very hard to get those bad genes out of the line.

Even if the pups look different does not insure the sire is different, traits are known to skip generations. As an example you can breed a lab with a german shepherd, take a lab looking pup from that litter and breed it to a known full blood lab and still get a german shepherd marked pup. Some genes are recessive and not visible (genotype vs phenotype) Dogs that are of mixes especially over several generations of different mixes added in can produce pups that are 'throw backs' ie look like previous ancestors.

Some genes are also fatal in combo, Great danes are known to have a color link fatal gene. Merle to Merle breeding will cause aborted litters.

Answer 2

Eeech, yes it's bad. It narrows the gene pool so much - you need a wide selection of genes to give the best chance of health. Puppies that are born to parents that are this closely related have quite a high chance of having problems - not necessarily obvious deformities, but problems like organ trouble that may become evident a little later on.

Also, responsible owners do not just let their dogs mate whenever, whether they're brother and sister or not. Please find out about having your dog's neutered, it sounds very necessary for their health - and the health of future pupppies.

Chalice

Answer 3

It is IF you don't know what you are doing and are inexperienced in responsible breeding practices..NO dog related or otherwise should be bred until it is at least 2 years old, the pedigrees have been thoroughly researched for at least 4-5 generations (preferably farther) for health, longevity, breed standard & temperament, the dogs have been either shown or evaluated to ensure they meet breed standard, the dogs have had and passed genetic health testing (not just simple vet exams).
Inbreeding can cause some very serious issues if you don't know what's behind the dogs.While it will bring forth and strengthen the 'good" it will also bring forth and strengthen the "bad" and if you don't know what "bad" there is behind your dogs you could be in for some serious health issues in the resulting pups.

Answer 4

Inbreeding dogs can create puppies with a lot of problems - the bad traits that exist in all dogs will be multiplied each time a dog mates.

Also, have your dogs spayed and neutered. The shelters are full of unwanted puppies, both mix breeds and purebreds.

Answer 5

You should really get your pets fixed instead of bringing likely damned puppies into the world. You don't appear to have correct breeding knowledge. I would say this even if they were not related.

Inbreeding isn't "so bad", neither is linebreeding or outcrossing. Breeding pet quality dogs is bad, like what your dogs are! If you inbred you CAN increase your chances of producing a litter with higher percentage of health problems due to like genes. Do you even have any idea of their pedigrees and their genetic make up? Did they have health test done before you let them go around trying to mate? I have excellent dogs that are inbred, linebred and outcrossed but they didn't come from some breeder who just let any dogs mate for the hell of it.

Most domesticated animals are inbred with success by RESPONSIBLE breeders who know what they are doing. People like yourself yourself turn out bad animals no matter how they breed, even with outcrossing. Inbreeding will just produce higher percentages.


http://www.paradisepasofinos.com/Athena.htm
Here is a horse I have looked at getting. Yes she is inbred but it wasn't done lightly like your case. Get your pets spay/neuter!!!

Beccy simply having a child with your cousin will not produce a color blind child unless you are carrying the genes for it. Just like anything else. Inbreeding doesn't "create" the defect or disorder the dog/person is already carrying it. What inbreeding does is make it come forward due to like pairings of the genes, since you are related and might be higher likely that both of you have the same recessive gene. A lot of people are color blind even though they are not inbred. This is because like in dogs people also carry problems for predisposition to certain health issues even if they are not related if they are both carriers you see the problem.

You can outcross to different breeds, say a German Shepherd and Rottweiler and still get pups with Hip Dysplasia.

It would be a lot harder to inbreed healthy people then healthy dogs. I'm talking about responsible breeders, not like this poster. People generally "fall in love" and have kids and chose their partner on the feelings they have for them. No health screening, health testing or thoughts of what that person is carrying. So if they are going with someone unrelated their kid might still have a genetic defect due to them carrying it and maybe not even knowing it exist in their lineage. However in dogs breeding stock is chosen on strict selection. Both parents must meet up to the breed standard, have a sound temperament, and be healthy themselves and genetically healthy and have screening for genetic problems prior to breeding. We also have pedigrees to follow and tell us details about the individuals.

Answer 6

Inbreeding and line breeding are things that should only be done by an experienced breeder who has done proper research of the breeding pair in question well before allowing the breeding to occur.

Oh, and "I have plenty of homes for the pups" is the worst excuse a backyard breeder makes to "justify" the unethical actions. Welcome to the world of backyard breeding, where you don't have a clue how to breed responsibly and think you have a right to it.

Answer 7

because the genes are too similar the puppies will likely have big problems when older which will cost heaps of money taking it to the vet all the time. they will also have shorter lives
thats the reason pedigree dogs have more problems.
its really not a good idea to let them mate.

Answer 8

I've heard that dogs are like humans in that respect - for example, if you had children with your cousin, they would be predisposed to colourblindness, etc.
My mum told me that it's because they have a smaller gene pool or something.
I can't really give you a specific answer - I think it's partly down to luck! But I'm not too sure, so read your other answers too :)

Good Luck!!

From Beccy xx

Answer 9

There might be recessive genetic disorders in your dogs that, if bred, will show up in the pups. It´s best to keep the gene pool diverse to limit the possibility of that happening.

Answer 10

Any hidden genetic disorders are more likely to appear in the pups.
You shouldn't let your dogs mate, where will the puppies go?