Rats, Part 5!!! Will it ever end?

So I have killed the rat, and I am thinking not a problem, until. I get up the next morning flip on the kitchen light, and hear the pitter patter of little feet running across the floor. Normally this wouldn't have even phased me cause we have this little mini poo, but on this particular morning she was in her kennel, and I thought crap another rat. I looked high and low, but couldn't find it. I finally pulled out my stove, and Kabamm, RAT CRAP EVERYWHERE!!!!! So I remembered a funny smell from behind the washer too, so I pulled it out, and rat crap there too. Not only rat crap, but they had pushed the vent hose off my dryer, so they had easy access to come and go as they pleased. Well I spent the morning cleaning up the mess, and getting the dryer hose back on and clamped down tight. Then I went and bought a trap, and set it. Well that night right before I went to bed, SNAP, YAP YAP YAP, the dog got into the trap. After attending to the dog and getting her calmed down, I reset the trap. I got up the next morning, and had caught the biggest freakin rat I had ever seen. I set the trap again and for several nights never caught anything, so I think, rats gone right? Wrong!!......TO BE CONTINUED..AGAIN.