I am an occasional Ubers players, and I admire you for using these Pokemon, I love this team, and I left a luvdisc :). So I was thinking hard, and I might have found a good Pokemon for your team: Blaziken.
Blaziken @ Life Orb / Leftovers
Trait: Speed Boost
EVs: 252 Atk / 252 Spd / 4 HP
- Swords Dance
- Flare Blitz
- High Jump Kick
Standard Blaziken, and yes chickens are birds.
Originally Posted by Fat Wikipedia
Chickens are gregarious birds and live together in flocks.
It isn't weak to SR, although Spikes and TSpikes affect it :(