First of all, you did invite them. It’s only been two weeks since you took the feeders down, so they’re probably still reaping remnants of seed. If they haven’t moved into (or under) any structures on your property, such as sheds, wood piles, etc., there’s really nothing you can do except to wait it out. Which is really the best option anyway, as poisoning creates many new problems – such as the possibility that your dog will catch a dead or alive poisoned rat, thereby ingesting the poison, or the rat will die somewhere you can’t reach it. The only real way to address a rat problem is not to provide food or shelter for them. They will eat your strawberries, though.
If you don’t want to wait for them leave, John at Adept Pest is the best pest guy around. He’ll probably tell you all the same things, just like he did me, but he could look things over for you to see if there is a problem that won’t go away on its own.