I found some small black objects in the kitchen that look like some kind of feces. Reasonably I suspect that could be rats', but they are small like rice and dry, and do not smell. Does this sound like rats' droppings?
Their droppings do smell but not very much, their urine how ever if you have a few does smell and it can be quite fowl. Most rats spread disease via urine and dropping. Some of these diseases are deadly to man. Lasser fever and of cause Plague.