ok here another example

i dislike turkey, but love chicken, i would never show INTEREST in turkey, but i will in chicken. So, if you fry up a turkey leg im not going to come out of my room to see whats cookin, but if you are roasting a chicken i will, get the comparison? Thats what im trying to understand, why would my BP even show interest in a prey he dosent like? Why does he even come out of the hide at the scent of a rat when he knows he dosent like rats?