Pet Poultry... ?

I've seen several hispanic families in this area with pet turkies and ducks, and this week now someone has a rooster. I can hear it crowing all throughout the day, since I teach in a temp/ portable classroom outside. Does anyone know, do they eat the ducks, the turkies? I haven't seen hen houses or anything in the yards, so what's with the roosters? Maybe they make them fight!? Interesting cultural differences...