After losing all of our 5 month old raised from day old Buff Orpington chickens last year to a mink without ever getting an egg. We have decided to try chickens again. We saw an ad for 2 year old hens from a local farmer. We bought 6 hens last monday . The chickens started laying the second day . One of hens does not look healthy missing tail feathers and breast feathers and her egg laying area seems swollen . They are all acting happy, eating well and we would like to get them healthier?. Is there anything we can do beside supply a clean, safe environment with good feed and water? Also some of the eggs have blood spots. The old farmer did not remember the breed but they are a red and white chicken. Thanks