A stoa is best described as a combination of a bull and cheetah bound in the skin of a crocodile. Their large brow horns are mostly used for just display but during hunting they have been observed ramming their prey occasionally before biting. They are ambush hunters and lie in wait before chasing down prey with an explosion of quick speed.
When stoas and other abelisaurs attack prey they deliver a large bite to the neck and refuse to let go. Instead slowly having their prey die from blood loss or exhaustion after hours of agony.