I've kind of read conflicting info on this. Some people don't seem to have a vet for their chickens; if they get badly sick or injured, they slaughter them. But then others seem to go to great lengths for their chickens... taking them to the vet, bringing them inside to nurse them back to health, etc. What is the "norm" for vet care on chickens? Is it hard to find a vet that will treat them? What kind of vet would a chicken need, would an avian vet be able to see them?