Yes, good idea. IF the pullet had a Mycoplasma disease MG or MS, it will be gone in 3 days time from the environment. We dont know if your pullet had MG or not, but it would be best to sanitize their living space, feeder and waterer, bleach water will work fine.I'm considering locking them up in their coop all week, to give the sun time to kill anything that may be on the ground in there run and garden areas. Does that seem like a good idea?