Suggestions:
Make the Attack line the same as the Full Attack line.
Skill Ranks: Diplomacy 11, Handle Animal 11, Knowledge (nature) 11, Listen 11, Sense Motive 11, Spot 11, Survival 11 (or possibly lower Diplomacy and give it ranks in Hide and Move Silently)?
Feats: Great Fortitute, Skill Focus (Handle Animal), Track
Advancement: 9-16 HD (Medium)