[TOMT][GAME][2010s] Probably indie-style game centred around magic and anthropomorphised animals

This is driving me nuts. most of the details escape me, but I remember playing this game years ago when I was younger. It became unplayable when it was taken off the App Store and I stupidly deleted it, but now I cant figure out what it was.

I believe the front cover of the game was this 3D (maybe blender-style) image of an an anthropomorphised dog that was brown and one of those moustache breeds, so some sort of terrier. i think we played as some sort of cattle dog, and he was the ‘mentor’ that was instructing us on how to perform magic to get rid of some sort of evil. It was a black veiny substance turning all the creatures feral, and you had to battle them to get to new areas and maybe clear the evil? I’m not sure. It’s in a forest and I think some of the creatures were pixies…? It’s a very nostalgic game for me