Horton is going to hear a Who at Netflix. The streaming service is expanding its programming for preschool students with five new animated Dr. Seuss series and specials, Netflix announced Tuesday. The new programs — “Horton Hears a Who!,” “The Sneetches,” “One Fish, Two Fish, Red Fish, Blue Fish,” “Thidwick The Big-Hearted Moose” and “Wacky Wednesday” — “will explore themes of diversity and respect for others all told through fun and engaging stories that incorporate the whimsical humor, distinctive visuals and rhythmic style of Dr. Seuss,” the streamer said. “We are always looking for new and…