Why are some people against crossing breeds of dogs?

Some people say the dog breeds and crosses crossing is poor are more likely ending up in shelters. This is ridiculous miscegenation, it is good for the puppies. More healthy dogs because of something called "hybrid vigor". Why a cross have a better chance of ending up in a shelter? That makes no sense at all. Some people say it is a mongrel dog of his adult temperament "unknown", but that's nonsense. The vast majority of all dogs (mixed or not) have good temperaments if approached properly, and has nothing to do with whether or not is a mestizo. I see nothing wrong at all with the crossing of breeds of dogs, and is actually beneficial for the puppies. Forget about the confirmation sample and those things because of that anyway is silly. Comments??

Hybrid or mixed breed dogs can have genetic problems yet because we still is the junction of two first generation dogs. Ranchers who raise thoroughbreds race to create a first generation hybrid believe in the effect of heterosis and hybrid vigor. Vigor means, "Physical or mental strength, energy or force." Unlike purebred dogs, when taking a hybrid, you know exactly what the temperament, size of the dog or the dog will look accurate. When you breed two different types of purebred dogs together you can get any combination of any of the features found in any race. If you're stuck in a hybrid dog, how do you know which to choose? Read the temperament and care for both breeds on the cross and be prepared for any combination of the two. If everything about races matches you and your families personality and style of life that can most likely assume this cross will work for you. If there is anything about any breed in the cross that you feel matches what you are looking for, prevent intersect. Do not assume or have the possibility that only the good characteristics emerge. You can be a big surprise and not just for the puppy to chance that. However, I believe a good dog or mixture, is far superior to a pure-bred ill-bred.

Puppies On Old 1930′s Trading Cards – Dog Breeds