The movie started out with a family putting their dog outside on a chain leash before having dinner. Then the dog starts going off annoying the dad. The dad angers the daughter so she goes upstairs to listen to music. Then dog goes silent (dog is gone) then killer kills the family then the daughter upstairs.
Next it goes onto a family of three where the dad and son are related and the son doesn’t like the dad’s significant other. They stop somewhere where the kid eats carrots and the girl makes a comment about how carrots will help him see better and references his glasses.
Next they arrive at the house where the family died and it’s a mess from like food as if someone had a party there and the dad says that it must’ve been some teenagers. There are rats so the dad knows that they’ve got a hole somewhere.
That’s what I can remember pretty solidly, I might know the plot or something about the killer but it’s a little fuzzy and might throw you off.