What precautions (if any) do you take when you introduce new hens or pullets to your flock? Well, I guess not a flock... I only have 1 chicken lol. She is a docile sweet silkie pullet. Do you put them on medicated feed or treat them prophylactically with antibiotics? I have Gallimycin, Sulmet, and Wazine on hand. Also, I had a few sick chickens pass away - vet confirmed a gram negative bacterial infection. I have since moved the chicken tractor, thoroughly disinfected everything, and treated my remaining hen. Anything else I should do?