Animal Anatomy

I'm basing the majority of my anatomy on gorillas because they can walk on their back legs and all fours. I am adjusting it accordingly though because my creature walks mainly on his back legs but occasionally on all fours. 
His legs are very loosely based on otters legs, his thick neck on either a deers' or gorillas neck and the head is based off a rabbit (over a frog because I couldn't find any diagrams of a frogs head muscles)