Cross Breeds - why do cross breed dogs live longer than purebreeds????

why do cross breed dogs live longer than purebreeds????

Public Comments

hybrid vigour. no in-breeding. less inherent problems.
They don't. Get a life, read more than just propaganda, and do some original thinking!
they tend to have fewer health problems
I've never seen or heard of this being true
Where do you get your info? I know of lots of chihuahuas that have lived to be over 20, some over 25. Smaller dogs live longer than large ones.
Who told you that? That's a bunch of garbage. Purebreds would be just fine if people would breed quality dogs and not just anything that came along. Edit: ROFLOL!!!!! "No inbreeding"? What kind of bogus crap is THAT? lol
I wouldn't thinks so....mix breeding is like.....having a child with a distant relative...and the dog would inherit the health problem that ALL the breed have that it is mixed with.
the same reason why have children with someone in your near family (bro, sis, cousin) will make the kid retarted. the closer your genes, the more likely you are both receptive to the same diseases, the more likely the baby will have that disease.
many pure breeds have been over bred (too many dogs of close relation are reproducing). this increases the likelihood that diseases and medical conditions remain in a family line. this can also cause health problems of its own.
They don't, the oldest dog that I know is a purebred Dachshund that is 18. The oldest dog on record is an Australian Cattle Dog (purebred) that lived to 29 years and 5 months before it was put to sleep. There is theory that crossing causes "hybrid vigor" but that does not always apply. If there is a mix of breeds that have similar heath problems (like crossing labs and poodles, both of which have joint, eye, and seizure problems) you can actually get a sicker dog. Also, many of the "designer breeds" are being horribly inbred. BYW: AKC regulates how close of a breeding you can do, if you breed mother/son, father/daughter, or brother/sister the puppies cannot be registered.
They don't. Different breeds of dogs have different life spans. It has more to do with their size and level of activity than anything, but cross bred dogs don't live longer than purebreds. Some people say that because cross bred dogs aren't susceptible to disease as much, that they live longer, but that's just a rumor, and is not based in fact.
Mixed breeds don't always live longer, but often do have less genetic problems than purebreds have (from being inbred so often). Typically the size of the dog dictates how long it lives. Most toy dogs can live between 12-16 years while large dogs can live between 10-13. Some giant breed dogs only live to be 7 or 8 years old!
Who says they do? What scientific facts do you have? You do not know what you are talking about. I am so tired of people propagating lies. Quit trying to spread ignorance and stupidity. Get a life and grow up!!!!!!!!
Muts live longer because they are not prone to the same disease as a pure breds. They are not surcum to the steriotype tendancies of a particular breed...even mixed. Muts tend to take the best of both and in doing so are much happier animals....and in my opinion are happier in general. Better attitudes better tempers. Maybe because they need to adapt, not sure but they tend to look at life like every day is their last. Given a good home, they are more protective, more loving and more grateful that a pure breed. NOT sure why. I have raised many different pure breads and Iwill take my muts over the pure breads anyday
Typically, cross breeds are smarter because of the different breeds making up the brain. Each breed of dogs is bred for a specific purpose (ie: hunting, fighting, swimming, etc.). So when you add a different breed to it, then it tends to know more. For example, if you have 2 masters degrees then you will have more knowledge than a person with only one. Look a full blood lab. They can swim but they are STUPID. A mixed lab is normally pretty smart. Therefore the smarter the dog the better it's able to adapt to certain situations that can make it live longer.
Purebreds that aren't from a reputable dealer who screens both parents carefully wind up with health problems like joint damage, infections, tumors, so on and so forth that comes from massive inbreeding. Some breeds, like German Shepards suffer chronically from the results of inbreeding and tend towards hip, joint, and blood disorders. Careful breeders don't want to sell you an animal that will have these problems, but you probably have to pay more, so people wind up buying cheap animals from bad dealers. Also, mixed breed dogs tend towards the small to mid sized range, and smaller dogs tend to live longer than large breed dogs.
Don't in-breed them because they can get seriouse health problems. About the mix breed like haveing a shih-tzu and a cocker spaniel breed may work out.Don't breed large dogs to lil' dogs.Cross breeds live longer because they have differnt gense in them example: if you breed a con-hound to a lab their offspring would have good hunting skills and be VERY active. Hope this helped
Here is where the problem is with your thinking. When was the last time you have heard of a cross breed dog that has had it's hips certified??? When was the last time you heard of one with CERF certification???? Shall I go on???? Just because health problems in mixbreed dogs go unreported doesn't in any way imply that they don't have health problems, it just means they go unreported so there are no stats to draw from. QUOTE "Cross breeds live longer because they have different genes in them example" That is absolutely not true, every dog of every breed has exactly the same gene locations, otherwise a mixbreed would be sterile like Mules are.
Cross breed dogs live longer because they have been bred with defects like heart problems and hip problems in mind. Purebreeds like golden retriever have hip displasia, which cannot be avoided. The kennel clubs bred the dogs for show, not health. But the mongrel has the Least health problems, hence live longer. They may look plain but they are found to be more affectionate and stronger than purebreeds. Crossbreeds are a good option too.
Lifespan isn't as simple as that, so it's not true. Breeders of mixed dogs will tell you about "hybrid vigor", but all dogs are canis lupus and breeding the same species doesn't make a hybrid. A hybrid is the breeding of two different species and they do have problems. Hybrid vigor is a MYTH. http://mywebpages.comcast.net/NoPuppyMillsVA/Poo-dogs___Designer_Mutts/poo-dogs___designer_mutts.html http://www.westwinddogtraining.com/hybridvigor.pdf (PDF)
It's a matter of genetics. Because they have genetic material from several different kinds of donors, the mutts have a greater variance of immunity to some forms of disease and defects than purebreds (which have a very limited gene pool, needed in order to keep the breed "pure"). For example, if a (hypothetical) virus was developed and focused to kill Chihuahuas -- the pure bred Chi's would be more suceptible to that virus than a half-breed Chi whose non-Chi genes wouldn't be recognized by the virus... However, other factors figure in to the longevity of dogs: over all care, exercise, diet, safety, etc.
Um, they don't. Many small breeds live larger than giant breeds which may have given you this mistaken impression as many mixes are "poo" dogs. (thispoos and thatpoos) My purebred dog has many 15 year old relatives and one that made it to 17---and he is NOT from a small breed with an expected lifespan of 15+ years. My mix died at age 13. He had bad hips and a host of other health problems thanks to the genetic legacy created by crossing a purebred lab and a G shepherd/Doberman mix. The notion that two dogs randomly mating will produce healthier pups than 2 dogs with health clearances, good temperaments and sound bodies is an incorrect notion.
They *DON'T*!!! That's more of the same BULL that CROOKS-who have a shi*-pile of MUTT/MONGRELS to peddle-spread to SCAM the gullible MORONS!!! It's LIES,foo'!
They don't, it's a myth.