It is hard for a small BG once ambushed to give off a chemical response from the stomach of a LMB. :p It is in an acid bath before it knows what happened.

Your LMB example is a good one of hunger overcoming a warning. For all that big LMB knew the small one was giving off that chemical because it (large one) was chasing the small one. Also a good example of how many factors are at work at the same time , why we often don't know why an event occured and why it would be very difficult to measure.