Radagast the Brown invited you to his hidden dwelling in the southern end of Mirkwood to ask for your help in a vast undertaking.
'I have seen much conflict the realm over. It pains me to see innocent beasts caught in the battles of monsters and Men. If I do not take action, there will be no animals to tend to once the fog of conflict has lifted.
'${PLAYER}, you have shown me a great will to explore and preserve the beauty of these lands. I have a gift for you.... Hold on just a minute....'
Radagast can be found in Rhosgobel.
Wait for Radagast to find what he is looking for.