My poor ah boy. We found that he has some fluid inside his left ear, so have to bring him to the vet today. Turns out to be a blood clot and need to drain it out and have it bandage. Like human, old dog got a lot of problems. Feel so sad for him. Nowadays he look so moody all the time, sleeps the whole day. Furthermore, he is becoming a bit senile and blind. Feel so sad for him.