According the bone tissue of the theropod fossil, it should be warm blood. As their bone structure is look like warm blood animal like birds and mammal rather than cold blood animal like reptiles. And the ratio of Predator to prey in the Cretaceous fauna is similar to now rather than the Permian.. So The chance of theropod being a warm blood animal i high
However, some paleontologist suggest that sauropod should be cold blood. And anyway thats no different of the sauropod being cold blood or warm blood. Because its surface area compare to its volumn is too small. Then the rate of heat energy lost to the surrounding and absorb by surroundin is small. The sauropod can keep its constant temperature notwithstanding warm blood or cold blood. Beside that, to maintain the largh size, a group of sauropod should eat many tons of plant each day which seems impossible... So there is still chance for those theropod be the cold blood animal....
