Video answer: Cats hissing at each other
Top best answers to the question «Why do bonded cats hiss at each other»
Cat “A” puffs up and hisses… Both cats become startled, puff up, and assume defensive postures. When they see each other in a defensive posture, they act as if the other is about to attack. Consequently, each reacts defensively, a fight ensues, and thereafter they are aggressive whenever they see each other.
Video answer: Why do cats hiss?