Your Buffy was gorgeous - and I feel for you. I just lost my Jane, a buff Pekin Bantam.....I think she had pneumonia - and a heart attack. She was such a sweet chicken, and I'm uncertain what her age was - probably over six years, and I'm not sure of the lifespan of a Pekin Bantam - does anybody know please?
I am busy treating all my chickens for health - garlic, apple cider vinegar (for mites and worms) as well as ginger and chilli (heart, lungs and arteries) and cod liver oil - the latter especially in the winter, when there is not much sun. Jessie (my only red shaver)is the one who showed signs of leg mites, but all the chickens are getting the "health treatment" as a routine part of their feeding.
cuisle - mother of buff Pekin Bantams, Araucana chicks, a Rhode Island red X hen and a red shaver.