I appreciate the troll. They can keep their dogs inside the apartment, there's no need to keep them on the balcony(where all the neighbors can hear their loud barking) and inconvenience others. If the owners wake up so early it's their business but as soon as they wake me up so early(when I don't want to be woken up) then it becomes my business as well.
I've tried to talk to the owners a few times but they didn't open the door. They probably see that I'm a foreigner and don't want to deal with me. They opened the door to the manager and security guards though. From what the manager told me they are a HK couple in their 40s.
UPDATE: After multiple complaints about them the manager decided to write them a letter warning them not to let the dogs out on the balcony in the morning. There was no morning barking for 2 days already but they still let the dogs out on the balcony in the afternoon and they bark all day which I don't really mind, as long as they stay quiet in the morning it's all good. I just hope they can keep it up.