I've had guineas before and ended up losing them to predators. I try to raise young guineas and chicks together to encourage them to roost in the coop. I had a friend tell me that feeding guineas chicken food will kill them because of the antibiotics in the chicken food and Guinea's bodies do not tolerate them. I didn't know regular chicken food has antibiotics. Is this true? All of my birds are free ranged and have access to 80 acres so there's plenty of insects.