These postures can result in a stand off, a decrease or an increase in the aggression. This may be accompanied by putting the ears back and hissing or growling. In addition, the cat may swipe at the intruder with a front paw, either with the claws sheathed or exposed. Sometimes the cat will gather its legs under and appear ready to pounce. If the intruder is not too close, or begins to leave, the aggressive encounter may end.
Cats have other more dramatic body postures that signal go away .
Cats frequently try to enhance their size and ferocity to make the threat more menacing. They will do this by turning sideways to the intruder, arching their back, holding the tail upright or straight down, and having their fur stand up. They may hiss, growl and yowl at the same time. In other situations a cat may crouch down, tail switching back and forth with the ears tight against the head, again with accompanying vocalization. A cat anticipating a fight may roll onto its back with claws extended ready to fend off a foe.