Bulldogs can catch rats on occasion however, they do not posses the prey drive or stamina that it takes to be good at doing so- unlike terriers who excel at the act.
they eat birds not rats
They eat rats, birds, lizards and small animals
They eat worms rats 
Owls and hawks (and other birds of prey) eat rats.
they will eat bugs, birds and rats,but they usely eat bugs
They eat rats, birds, lizards and small animals
no
Rats, fishes, and other birds
Mainly mice, rats, rabbits, birds.
Most snakes eat birds, mice and rats. Including cobras
it will eat rats, smaller birds, stream animals, and insects.
Small birds or rats most likely birds because thats what they eat in the wild
frogs,birds,lizerds and rats