NOOOOOOOOOOOOOOOOOOOOO!!
Honestly, I don’t like the look of the pet now. I liked it more when he was innocent looking, that enhanced the whole “master protecting his pet” type thing… because now it looks like the pet could kick some serious ass with kung fu or something, look at those eyes, hes like “I know im bad ass, want a piece of me FREAK!?”
lol 
I dunno, I think your straying a bit too far from your concept, which I personally liked alot.
As for the harness/collar thing, why not just have the pet holding ON to the rope himself, with his 2 feet and one arm (spider man anyone?) and grabbing the grena…er… I mean jewel with his free hand (so he would ne upside down you know?)
also another idea is give him LOONNNGGGGGGGG ears that are pulled back behind his head and that curl at the end… 
The pet doesn’t look friendly anymore :sad:
Anyways, still good work…I GUESSSSS :D:D Nah man its great work, just I don’t like the current design of the pet too much 