[Cerek the Barbaric]

You should be able to complete the quest, as far as I know. I'm playing a Wizard/Rogue and I was able to read the scroll - even though it is a Druidic spell. I certainly can't read any of the OTHER clerical scrolls I've found, so if the game allowed you to have the quest, it should also allow you to complete it.

IIRC, I opened the cages first and "spoke" to each animal. Each one said they were nervous and would stay in their cage until the a path home had been created. After speaking to each animal, I then went back out to the tree and was given the dialogue option to read the scroll. The "portal" opened and I went back inside. I then told each animal to run out to the tree, which they did. Then you have to follow them outside and actually tell each animal to step into the portal. You recieve 19xp for each one that goes through and then the portal closes.

Hope that helps.