1. I found the key for that nearby in the bathtub i think or something like that.
2. I killed the bunny around level 14. Well i jumped on a rock so he couldn't get to me and for like 20 minutes or so i cramped my fingers clicking to kill him with an arrow.
3. I just killed the white chicken when i found it [it wanders near the shrine nearby from casper]
4. I found that after mindreading in tim's stables, where you also find dana's book
5. there is another topic dealing with this or use the maps from here
http://www.larian.com/forums/ubbthreads.php?ubb=showflat&Number=372296#Post3722966. i wonder about that myself, couldn't spot where that chest appeared.
That being said i have some questions of my own:
1. before going to the island i couldn't complete the quest given by richard where i had to chase those seekers guarding the supplies. I told them to go help with the dragon hunt but one of them stayed behind and wouldn't move/talk to me. Also mouse won't help me either. not sure what went wrong there.
2. Might be stuck at the jonah quest he mentioned something about a gem from vacca but when i did vacca's quest i took it from the dungeon while clearing it from ghosts then gave it back to him when he asked and now it seems i can't find it anymore. was it important for jonah's quest?