I don't think an uninvited guest would make out to well here. Candy just plain doesn't like strangers. All the rest of the gang is leery of strangers also. They even stick close when people we know come by if the dogs don't know them.
Had a salesman come to the door two weeks ago. He knocked on the door after opening the storm door. The door wasn't closed all the way and when he knocked, it partially opened. The dogs were already behind the doors barking away and when the door partially opened, he was met by four big ( and one small) sets of teeth. He later said he must have jumped back three or four feet from the door. The dogs didn't attack, but he was, no way and no how, going to get through that door!!
The gang is real good about stuff like that. If even a stiff breeze tries to lurk, they're on the job