I do not know the answer to your question -- but if you go to the Killer Bunnies website and click on Bunny Bits, you can find extended rules and clarifications for each card. I've found the answers to a couple of different questions this way.
A Free Agent bunny may become a bunny of any kind and any color (except Red). The identity of the bunny may change at any time during play as the need arises. Free Agent bunnies make forming a Bunny Triplet much easier.