Our house has become the temporary home for my daughters two cats. They have been with us for about 2 1/2 months and everything seemed to going along fine. During this initial time our daughter and her partner were traveling around our region and returning back to our place every couple weeks or so.
Things have taken a bad turn to the worse this last week after our daughter and her partner left to go off traveling for the next 10 months or so. The two female cats have developed some animosity towards each other and will end up howling and hissing at each other with it quickly escalating to a "cats in a rolling ball" fight with fur flying unless we are right there to intervene and break it up.
So far the only solution seems to have been to try to isolate the two cats from each other by keeping them shut into a bathroom or smaller room. Unfortunately this has it's downsides because both of the cats are very social creatures and want to be by people all the time. Thus when they are shut behind the door they meow and cry in the most forlorn way.
I am looking for good ideas of how to get rid of the aggression between the two cats so they can go back to being their peaceful friendly selves in the same room.