What dinosaurs did nanotyrannus hunt?

nanotyrannus was a small tyranosaur, compared to T-rex. it most likeley hunted smaller dinosaurs, like tescelosaurus,or killed juvenilke animals. maybe it scavenged from troodon,tough nano-T was well capable to kill. so,possible prey are: tescelosaurus,troodon(maybe),juvinile dinosaurs(including t-rex young)