FYI, mice and rats will not abide in the same building. Your report will be more credible if you determine which you have, mice or rats. You can ask any exterminator and they will confirm this fact. You can distinguish the two easily as rats are larger with longer snouts and ringed tails and larger front teeth. Evidence of chewing large holes in walls or wires are a sign that rats live there. Mice are much smaller animals and tend to run along the pipes inside the walls of a building to get around without making large holes as they can flatten their bodies to the thinness of a nickle to squeeze into places they want to go. I mention this all because ,the white footed mouse, common in Philadelphia often carries the commonly called deer tick which can cause Lyme disease. so you may want to get a blood test if you are living near them. Rats feces can contain the hanta virus which can give you a respiratory disease. You don't need to touch the animals or be bitten to get sick. They also carry fleas. I hope vector control can help you to get rid of them. The longer they stay the harder they are to get rid of and as they multiply they spread to other buildings. Good luck!