Could anyone point me in the direction of a lab that will undertake analyses of corticosterone from feather shafts?

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Benjamin Nephew

You could try Michael Romero at Tufts University, who studies cort in birds, or Jerrold Meyer at the University of Massachusetts Amherst. He assays cort from hair samples.

Reuven Yosef

THank you.

Steven L. Van Wilgenburg

Hi Reuven. Try contacting Graham Fairhurst, he has a ResearchGate profile and you can message him through that. -Steve