What about animals?
The talk of Kelly McGonigal implies that stress is only problematic when individuals classify it as bad. However, stress is also affecting animals, with stressed individuals living less long (e.g. http://rspb.royalsocietypublishing.org/content/279/1729/709.short). I have difficulties to conceive how animals could classify stress as bad and suffer from it (because of their limited cognitive abilities), but also how humans could not be sensitive to stress when animals are. Any ideas how to reconcile the two?