I gave you 2 examples. My 8 months Dumerlis Boa who eats large mice and my yearling BCI who eats medium rats. It seems you saw only one! As i told you, once my BCI has his mouth on the rats face, its finished. The rat has no face anymore. My BCI is 4 feet long. If that rat want to put up a fight, i will say "bring it on". My BCI eats live rats since he is 3 months old.