Hi! I am very new to chickens, and am wondering about the disease resistance of the barred plymouth rock breed. One review of them seemed to suggest that they were prone to Mareck's (which has a vaccine), but the rest didn't mention anything about its hardiness. Some websites seemed to suggest barred rocks were hardy, but others described them as not as disease tolerant as other breeds. I really like their cold resistance(I live in New England), feather patterns, and egg laying, but if they are not resistant to diseases, then I probably won't choose them. Does anyone have a definitive answer on their disease resistance and other, similar breeds? Thank you!