No clue where the chicken is, or, at least, I found some graffiti and there's two areas I cannot reach, but I don't know how to either. Small hint would be nice.
Ah, yeah, ok, but in the chicken room there's an exit on the top right. And when falling all the way down there's a tunnel halfway to the left. How can you reach those? I thought that was part of the 'chicken objective'.