Clucking (or crowing) chickens are no less disruptive to rest than is traffic/industrial noise, bad smells, dirty rooms, vermin or drunks/teenaged sports or cheerleading teams/frat punks thundering up and down the halls slamming doors and yelling.

Good call on the part of the pilot. Either cough up the $$ necessary to get the crews a hotel where rest is possible or cancel flights for fatigued crews.