I enjoy having roosters - while I've got mine in an enclosed run most the time, the roosters do make alarm calls if something flies over or if a new dog comes in the yard. I'm loving my roosters right now too because I've got some broody hens and they actually hatched out a couple of adorable chicks. I think they're a natural part of a flock but wouldn't get more than 1 for your small # hens.