I'm a new chicken mom and a friend of mine is wanting to get chickens and we were wondering... Can seemingly healthy chickens spread any sort of disease to humans? My kids love holding the chickies but we don't *always* wash our hands right after. Is there anything to be concerned about? I'm sure vigilant hand washing would negate any issues, but with 4 year old twins on the go, I don't always get that far that quickly! Thanks in advance!