This is really good!! :D I love how it has great composition and the expression on the dog is great! It was able to give me the imagination of what is happening in this artwork. The bug/monster looks amazing and badass!
The hair on the dog look little too short. Maybe you can make it little longer and then use the grooming brush to make the hair goes back like all dogs' hair look like. Other than that, it does look like a dog which is GREAT!
Just curious, How long were you working on this artwork? :)
I really look forward to see more of your artworks while I will be working on the castle environment :)