Nothing is quite so alarming as hearing the "hack-hack-hack" of a cat trying to cough up a hairball. And almost nothing is as disgusting as seeing one on the floor, unless it is stepping on it at night in bare feet. Ughh! Seriously though, although hairballs may be the topics of jokes among thoughtless humans, they are a source of discomfort or worse, for cats. Hairballs pose a potential danger by blocking the passage of digested food through the intestines, causing an impaction.
With three semi long haired cats fighting fur ball is a constant battle especially at change of seasons when they shed. A good brush every day and the right food helps. Hills make a fur ball formula that I found to really makes a difference. It comes in a senior formula which is ideal for my two old cats and a light formula for the youngest Fergus who is a tendency to weight gain. Here's more about hair ball at About Cats ..............