the author seems to suggest that animals remember things but don’t project into the future, i.e. your dog knows that every day at 6am he gets a treat, but does not anticipate tomorrow and the day after. Kind of like the first few sequences in Ground hog day.
Dogs may not. My cat can. He knows that if I bring home steak in a box on Monday, he’s getting a treat at dinner the following day. He knows he’ll get some, so while he perks up and shows his happiness, he doesn’t actually ask for any.