First of all, that mean's you'll need 2-3 doves.
Anywho... Good silent stuff: Card Manipulation, Manipulation Balls, Silks, Appearing Disseapering Candles/Canes, Linking Rings (if you get good at them, they really are quite impressive), and I'm sure there are a few more things.
Anyways, those are just some general ideas to look into, for incorporating into your silent act. Infact, I don't know if you've seen these or not. But check out these people's dove/manipulation acts. It might give you an idea on routing effects (not to steal a routine, just ideas). These people aren't the best or anything. Just some vids on MVD. But it's still nice to see. Get a general idea for things you like. Like "wow, the candles are really cool, I think I might do something with candles in my act" type stuff.
I could of sworn there were 3 vids.. Oh well.
PS. For those people who think I promote stealing material. You've got it wrong. I'm not suggesting stealing anything, but getting ideas. Looking at how the acts flow (well, some don't flow as nice as others) and deciding what would be cool to incorporate into your own act IE candles or silks or whatever. Not stealing an act. Just wanted to get that straight before someone puts words into my mouth.