So, I went back to the spirit's chamber, but there was nothing there. The hidden doorway was gone. I also checked the ladder in the planetarium, the end of the trail, the place where I got the sword, etc, and I have all 39 items. Where is this rainbow chicken?
Edit: Wait, no, I got it! Ha! XD
Now to find more eggs.
Edit 2:
I GOT ONE!!!!!!

That took forever.