I would like to add a few chicks or pullets to my small flock. Three years ago I bought six chicks of various breeds from the local farm supply. All chicks were beautiful and healthy. But over the three years, all but one has had "egg-making" problems. The SLW and the GLW both laid eggs with thin shells. The BO had a problem with eggs breaking inside her. The RIR just plain old layed down and died at 1 1/2 years. Now the EE has egg peritonitis and her days are numbered. When she goes, I will need two new pullets and I am determined to not get hatchery chicks. Are heritage breed better for healthy egg production. I don't need hens to lay huge eggs every day. It means more to me that they are healthy and lay a few eggs a week and live longer. Can you suggest breed that I might look into? Should I find a farmer with a mix of breeds? Any suggestions will be appreciated.