When I started out, I worried and fretted, but I began to watch and really think about what my chickens were telling me.
At one time, I put aprons on chickens with the best of intentions, until I realized that bare back chickens bother people more than chickens, and that they really didn't like wearing the aprons. That the aprons could cause problems too.
I thought baby chicks needed heat until they were fully feathered, now I have them down and in the coop and run with out heat by 3-4 weeks. They are much healthier running in a big area rather than 'safe' in a small tight area.
I don't read the disease and emergency page here. I have had chickens for years, and a lot of that IMO should be handled with a mercy cull, not a medical treatment.
I like to watch my chickens, I have birds that have been raised under a broody hen, that I have never touched. I don't check crops, I don't stick tums down their throats. I don't wrap ankles.
I firmly believe that a chicken that is eating, active and has bright eyes is healthy. If a chicken is not - she should be pulled from the flock, and if not better, dispatched. I have done one for that reason in decades of chicken keeping.
I have found that soft-shell eggs tend to get better with treatment in a week, and in 7 days if you do nothing. That people have almost no influence on egg laying, and diet very little, if the bird is not on starvation rations.
I believe that sunshine and fresh air are as important as feed and water. I have found they do not need feed 24/7, nor water. Warm water is nice, but truthfully, if they get fresh water once a day, they do just fine.
Shade and water is very important in hot weather, shade all day long, as it moves with the sun. But I have never taken ice to my birds.
I do not expect my birds to live forever, or even for 10 years. Right now I do have Mrs Feathers - an excellent broody hen who is going on 7-8 years. But she is the exception. I keep a flock the birds come into the flock and leave.
Me and farmer Joe are pretty close, but I tend to broom out the coop 4-6 times a year. If I would ever get over this cough, it needs it now.
Mrs K