Interesting discussion. Yes there are a multitude of countries who still eat dog. I live in New Zealand which is located in the South Pacific. Tonga is also a country in the South Pacific and one of their delicacies is .. you’ve guessed it dog.
In social anthropology we briefly studied one day the debate on eating dog and whether it's right or wrong. You're right humans breed other animals for slaughter including cows, pigs and chickens. What makes eating dog any different. It seems to be our culture and upbringing. Although perhaps our long history with dogs and wolves may also make eating dog seem wrong.
Personally I'd never eat dog, I'm vegetarian afterall. I also admit I don't think kind thoughts about companies who mass breed dogs for consumption. I know I'm being unfair but I saw a documentary about St Bernards being bred for consumption and it made me physically ill.