3.5 Druid awesomeness!

[GadialCain]

I have a Druid build and need feats. The progression is Druid 5/ Vermin Keeper 10/ Planar shepherd 5. The feats I have are Iron will, green singer initiate, and natural spell. What else and the source book, please!

[Godskook]

Multiattack(SRD) is useful if you're wildshaping. Metamagic(Chaining and Persist particularly) is good for casting improvements.