Cat Reintroductions - Why & when you should do it

What happens to cause two cats, who have historically gotten along, to suddenly act like strangers? It is stressful to watch two cats you love fight with one another - and not know what to do about it. Sometimes, a reintroduction is needed. Molly and Dewey discuss the causes of upset, how to know when it's time to hit the reset button, and the reintroduction method.