Finches In The Flock

Yesterday, I went out and got a pair of finches.  They're so cute, even if they wake up at an ungodly hour and jabber way.  Alas, Henry is jealous.  He actually bit me!  Not a hard but a bite nonetheless.  That's  not all either, every time I pass by his cage or change his food/water he fluffs up his head feathers and tries again.  My first impulse is to give him more attention, but it occurred to me that won't work out well in the long run (not because I don't have time, but he would soon realize biting = attention).  So I'm at a loss.  *sigh*

Note that this small cage is only until I help build them a bigger one.