Can regular black ants hurt rats or make them sick?? Today I discovered ants on the table where I keep my rats cage. At first I didn't see them in the cage, but when I did I immediately removed my two rats and thoroughly cleaned everything, throwing out the shavings and cardboard and then giving the whole cage a good scrub in the bathtub. Now I've put them upstairs away from the invading ants which we are now combating. But I'm worried they might still get in the cage somehow.