I think EvilKitty that the dog will give off endless amounts of love to its master like a true dog. So therefore it could never die. The alien would have plenty to eat. Until the possibility comes along that he doesn't feed the dog. :c
and yet the alien mentions death...so not photosynthesis.
Guys, you don't get it. The alien is just buying a puppy so he can survive on its own love*... like photosynthesis. (Yay, ignorance!)
*This sentence was not a double entendre on masturbation. Honest
The alien is not a monster, Frank. YOU ARE! I mean sure, you can live now BUT WHY!?
That's steve, not frank, but ....YOU NEVER KILL THE DOG!!! T_T