The dog became 50-50 specie...why?

Maybe to have variety. Some breeds of dogs when mixed to other breeds become more beautiful and tolerant. :)

Well, I have three pet dogs right now and none of them are purebreed dogs. The reason that I choose to have mutts (or mixed-breed dogs) is because of the fact that I love the temperment that mixed breed dogs do have. It is also true that when you have dogs that have a mixed lineage, it is much more likely that they are not inbred and this does mean that they will have better overall health throughout their lives.

In USA most dogs are cross bred. Since the majority are a mixed breed then I guess I dont think to much of it at all. Unless you are referring to cross breeding to create a new type of dog like a pugdoodle. (?) a pug and a poodle. Just to make a cute dog out of two cute dogs. I really dont think much of it at all really.

Yes, I've know how they do this. It's like taking a bull dog and breeding it with a terrier to make a Pit bull. Be it plants or animals, they cross breed to make stronger plants and animals. I have no problem with it.

I don't think those people are aware of what they do, unless they are some kind of Louis Dobermann and want to create a new breed. I rather think they know nothing about dog breeding and they breed their dogs randomly, regardless of the huge work people put to create the dog breeds they own now. They may do this out of curiosity, or because they think they are some kind of gods that can play with dogs' life.

There are also times that during the mating period of a female dog, the only available male around is of another breed. Like my dog, she's a japanese pitch, I don't know how it spells, and my niece offers her dog of another breed to mate with my dog. But mine has not yet reached the mating age. That is another reason different from those who are really breeders.

Sometimes it's not deliberate! If people do breed different breeds of dog, it is usually because they are attempting to continue particular traits. As a silly example, if you wanted a dog which could guide blind sheep, you would breed a labrador with a collie!

Well, I wouldn't say that makes the dog a 50-50 specie. I still believe a lot of dog owners and lovers out there prefer the pure breeds over the cross breeds. Also, the number of cross bred dogs are not that high. I think variety plays a big role in cross breeding certain species.

Maybe some are curious of what kind of a behavior or physical differences they can achieve in breeding different kind of dogs. If you would research some breeds of dogs ,you will notice that there are a few dogs recognized mostly from the UK which are half-bred dogs. Actually, I learned if from a cable show entitled "Dogs 101".

I think that some people just like to see what they can make by mixing breeds. There have been mutts for years, and the more they breed these dogs like this the less there will be of full breeds.

I'm sure there are many reasons someone would cross-breed dogs or any animals. The first one that comes to my mind is for health reasons. Pure-bred animals very often have genetic health issues. Examples: **Dalmatian - defective urinary system **Great Dane - Bloat (a deadly gastrointestinal syndrom), is the second most likely to develop a deadly heart disease, cancer, orthopedic problems, cataracts, disorders or the hormonal/endocrine system, skin diseases **Dachshund - intervertebral disk disease **Boston Terrier - Cancer, Epilepsy, Corneal ulcers, Heart disease There are many others. Pure-breds look a certain way and act a certain way because they are pure-bred. Along the line, specific traits were kept in the gene pool while others were bred out - the traits were removed from the gene pool. This means that pure-breds of a given breed have common genes - many. The traits can be bred out, or at least minimized, by bringing in additional genes - cross-breeding.