Just a tip, this looks like it is going to play too slow to be an agro deck and not have enough late game cards to be a midrange deck. If you are building Zoo, you want to go more for the agro strategy. Also, the reason you play
burning-tree emissary is to play it into
Reckless Bushwhacker and play his surge cost for free. I personally would also drop the
collected company for sure. It is far too slow and you aren't getting much value out of it. Company is best when you can fairly easily play 2 creatures with 2 or 3 converted mana costs. You should add
rancor or
atarka's command instead.