Actually as much of a person I am to completely admit my own artistic errors, I blame Disney for actually making his anthro form having very dog-like features. Looking at Nick's head in ZooTopia, his anatomy is very German shepherd like with the boxy muzzle as opposed lol! His design in the movie, apart from his colours, aren't very fox like at all.And I tried to stick to that here otherwise people wouldn't recognise him. I totally know the difference between fox anatomy and dog, so I totally agree with you. I just wanted to hear your input.