Why are dogs different BREED?
The different breeds are a result of controled breeding, a good example of genetic inheritance. The control in these cases may either be natural forces or human interference. Natural forces such as geological isolation gave rise to such dogs as the Dingo, African Wild dogs, Wolves (Arctic, Red, Timber, Vancouver Island, Ethiopian, ect) foxes and jackels. Human interference has given us Border Collies, Cocker Spanials, Poodles, Yorkshire terriors.
you can breed dogs that have same Father that have different Mother and are from different litters Breeding 2 dogs that have the same father and different mothers is breeding HALF-siblings. This is okay, but you should REALLY do some research on it; if you breed to closely related dogs that both have really bad faults, you will get terrible puppies.
The uses of dogs depends partly on breed,different breeds can do different things depending on how their bodies are built.They can be used as seeing eye dogs,herd sheep,guard dog,they can keep wild animals away from livestock and also used for competition,there are probably more things they are used for,it all depends on how the breed is built.
A pitbull comes from two different dogs. One is an unknown show breed and the other is an extinct hunting breed. The hunting breed takes 3 different breeds to make while the unknown breed takes only two. Therefore to make a pitbull it takes at least 5-7 other dogs. The breeds came from Europe. Pitbull type of dogs were first bred by mixing terriers (especially the fox terrier) with bulldogs. For example the bull terrier…
farm dogs and herding dogs, uh, that's dumb there the same thing! police dogs can be a number of different breeds, they can even be herding/farm dogs. so you'd have probably quarter wolf, quarter some type of herding dog, quarter some type of a different breed farm dog, and quarter whatever breed the police dog was.