You give a bloody chunk of minced meat to Dog.
The dog looks gratefully at you.
The dog eats the chunk of meat with great enjoyment.
A mighty voice says: You have solved the quest.
Congratulations! You have just completed It's dog!
You receive 18610 gold as a reward for completing the quest.
You receive 4 training points.

Actually managed to solo this one too, gaining a new top solo kill for the
reinc (a huge spider, 132711 exp). Also got the last few training points for
that elusive 1 point of con, and finally:

Hit Points     Spell Points     Endurance Points
 1000/1000        680/680            396/396