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quote:Originally posted by DoctorBeaverI've often wondered if dogs' amazing sensitivity to smell (or other animals sensitivity to other sensory input) has been a hindrance to them developing into more intelligent creatures. In the case of dogs, not only is their brain smaller than humans but much more of it must be taken up by processing olfactory input. Did the structure of their brain develop deliberately to have that degree of sensitivity or did that sensitivity evolve as a result of the way their brain evolved? My gut feeling is that it's the former & that its development along those lines stopped development in other ways.