Why Dogs Cant Be Eaten???

One of the hot issues in this world - whether the human beings should take dog meat for consumption is hard to find out one exact answer. Some of my classmates were discussing about the cruel of Korean. Cruel??? Killing people? Definitely not... This was due to the Korea government approved the dog meat consumption in their country. Erm... How about you? What is your opinion? Killing animals is a cruel process. And I think most of the people in this world will be sad to hear about it. Fish, pigs, cows, prawns, goats, sheeps, horses and etc... are they animals? Then why you all can be so enjoyable when having them as meals? Issit they should be killed? Each animals have their role in this world. Just like horses, our ancestors would treat them as a transport. Cows, which are extremely useful in agricultural sector. Dogs, which help to look after the house. But once their population is too high, it will cause us some problem. It will cause the ecosystem to be imbalance. I think it should be true. But if u told me you dont understand what is ecosystem??? :p Just find some biological reference books to have a look or searching from internet which is the easiest way in this technological world. So far, I still cannot find out what is the bad effect of dog meat consumption... That's why there is a dispute between me and my lovely friend... :p Haha... Try to have a rasional thinking... Think everyting in two ways... Then you will understand my situation.