Watch out for druids with Natural Spell and a lot of animal-enhancing spells prepped. Since Wild Shape is based on Polymorph, and polynmorph changes your type to that of the form assumed, a druid wild shaped into a dire wolf can cast animal growth on himself (and perhaps every druid in the party, sicne it effects multiple targets).
That's a two-way street of course. Hold animal works on them in animal form, too.
Owen K.C. Stephens
d20 Triggerman