It's a new-ruin; as such, it's an inferior remix of older strips that feature Elly trying to train Farley only to have it backfire somehow.
Panel 1: We start with Farley scratching at the front door because he wants back in the house.
Panel 2: The door opens but before he can go inside, he's sprayed with water.
Panel 3: He goes back to scratching at the door.
Panel 4: Once again, he's spritzed in the face before he can get in the door.
Panel 5: He tries again with the scratching.
Panel 6: Mike lets him in to Elly's displeasure.
Panel 7: She shoves the confused and upset animal back outside.
Panel 8: She holds out a book called "How to train your dog" and a water pistol so as to explain that she's trying to train Farley not to scratch on the door when he wants in.
Panel 9: Now that Mike has taken over training detail, the scratching sound has got him sort of enthused; he'll show at least one parent he can help out.
Panel 10: Too bad John was scratching at the door trying to find his housekeys; otherwise, he wouldn't have gotten sprayed and risked dropping the groceries.
Summary: The problem, of course, is that Farley shouldn't be wandering loose at all; if they remembered that such things as leash laws existed, they wouldn't have this sort of problem.