Backyard Poultry Law?

I have a friend who just got a rooster and a couple of chickens as "pets" in North Bergen, New Jersey (house dwelling).

Is this legal??? I'd think it would be really annoying to the neighbors. I went to animal law.com and tried to do a serach, but couldn't get a match for the description I put in. Does anyone know anything about the code/law for this sort of thing, or how I'd do an appropriate search to get the information I'm curious about? (His neighbors are complaining about the rooster crowing, and I warned him he'd probably get cited, but can't back it up. I thought it might be a noise decibel complaint, at the least!)