Would the laws of science allow this being to exist? A four-legged, two-winged dragon (and able to fly, obviously), he doesn't need to breathe fire or anything, just be large (at least the size of a horse), reptilian and mostly carnivorous.
I know evolution would not favor these beings to come into being, but if they were created artificially, could they live and fly according to science? Even if they don't breathe fire.