So two dogs, raised in the same household, exposed to the very same things, one may develop, say, a debilitating fear of motorcycles, or a phobia of the beep of the microwave, and another one is going to be just fine.
Tako da kod dva psa odgojena  u istom domaćinstvu, izložena istim stvarima, jedan može razviti, primjerice snažan  strah prema motorima ili fobiju od zvona mikrovalne pećnice, a drugi može biti sasvim zdrav.