cat questions please help me.
why do my two cats fight all the time. I've had them since they were born they are brother and sister, same litter. and ones a boy ones a girl. I got them spayed at the age of 6 months old they are now a year and a half old. and they fight constantly like getting on hind legs and slapping eachother or my male cat bites her back and it is driving me crazy..... help and I don't think they're trying to mate or anything... I don't think they even know how to since I got them spayed at a young age Idk help me cat owners! first time cat owner here. also they will hiss and growl at eachother