Complex sentence: Then his father cooks a rather nasty-tasting mushroom omelet, which Fudge enjoys Then the next day when Peter came home he went to check on Dribble, his pet turtle.
Split into simpler sentences: Then his father cooks a rather nasty-tasting mushroom omelet, which Fudge enjoys. The next day when Peter came home he went to check on Dribble, his pet turtle.