I would consider Flinthoof Boar

when it comes to zoo there are two possible ways to take it (and be competitive). Midrange or hyper aggro.

Naya midrange works off the back of Courser of Kruphix and Domri Rade letting you draw 3 cards per turn. The downside is that it basically requires at least 8 fetchlands (to shuffle your deck when the top card cannot be drawn). If you want to do this, consider cards like Birds of Paradise, Chained to the Rocks and Lightning Helix

Naya aggro is a little cheaper (and a little closer to what you have here). It works because of Burning-Tree Emissary, Flinthoof Boar, Boros Charm and Goblin Guide. But no one runs a 3 drop in the hyper aggro deck. If you are interested in it I would suggest looking up 'gruul aggro.' (despite the name it runs white)

Thanks for the advice