So we brought home a new baby today. Our other two cats definitely weren’t fond of the situation (which we anticipated). We have baby kitten in separate space of house but now our other two cats are growling and hissing and being very verbal when seeing each other. What shall we do in the situation? The other two cats are 1 1/2 and 8 years old and have always got along great. Not sure where to go from here with the two of them seeming aggressive now when seeing each other.