As someone who thinks of there hens as pets rather than live stock, I get so distraught when one gets ill or dies. I want to minimize the anxiety and vet bills in future, so i was wondering if there are some breads that are tougher? I know with dogs that certain breads have problems so maybe it's the same with chickens. What's been your healthiest birds and do you get your most reliable birds from private sellers or from hatcheries? Thanks.