if you mean, are there a lot of rats in the dr - yes there are.
however, if you are planning on starting a collection, don't bother, there is nothing special about dominican rats.
even the human ones are not as bad as people would lead you to believe.
giant spiders, cacatas, now that's a different story. i used to get them all over the place. hairy buggers as big as your hand.
.....jurones...watch out for those rabid bastards, you don't want to find one of those under your bed.
oh yeah, i think the big black snakes (not the green ones) eat the rats when they get the chance, but don't worry they are not venomous.
there are the odd scorpions, but they are really quite small.
watch out for those blood-sucking ticks as well - trying to get them off without popping them is not a pleasant experience, i can tell you.