My border collie + Mandarin
I also have a well trained Border Collie (called Linux; working as a rescue dog) and recently I noticed something funny about languages. When he sleeps I can talk in Polish, English, German, etc. and he just continue sleeping ignoring all the sounds.
However, recently I started learning Chinese and he is crazy about it! Even when I say 我 (meaning 'I') he runs to me and expects more commands ("What should I do?!"). 8)
The difference is in the tones and tone 3 "activates" him the most.