Mammals
As he had predicted, when he finished consuming both the apatosaurus and the dilophosaurus it was already the nine o'clock in the morning. It had taken him a whole night to make the corpses disappear into his jaws. Now, what remained of his two preys were just enormous skeletons, and many of the bones were even broken since he snapped them to eat the delicious and nourishing bone marrow.
Incredibly, however, he wasn't tired. He didn't feel the need to sleep at all.
When he was still a common spinosaurus he could stay awake for some days, but he still felt tired. Now, however, he was still in full force.