@alfirizkyr I'd like to point out that adult tyrannosaurs most likely did not have feathers. They would've been far too large and would've cooked themselves alive.
"These findings indicate “that most (if not all) large-bodied tyrannosaurids were scaly,” the authors of the study write. They add that the T. Rex may have had some feathers, but the plumage was likely limited to the dinosaur’s back."
From a study done in 2017. Chicken-osaurus Rex is largely an urban legend for people just getting into paleobiology, something along the lines of "blood inside a human's body is blue". Plummage would've slowed their heat loss after excursion, something the absurdly large T. Rex would not have been able to cope with.